DIRSIG 4.7

DIRSIG 4.7.5.17770

Release Date: Thu Jun 15 18:48:18 EDT 2018

  • General

    • Improvements to time precision management within the motion models.

    • Improvements to tape5 reading/writing.

      • Verified against 95+ tape5 examples inlcuded with MODTRAN6 (except local plume examples, which would be invalid anyway).

    • The Atmosphere Editor was updated to provide access to configuring a fixed lunar ephemeris (only access to the solar ephemeris was provided before).

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.7.4.17540

Release Date: Wed Dec 12 13:49:24 EST 2017

  • General

    • Further updates to improve the ability to bundle objects including bundle-relative paths for several mapped optical properties, including spectral reflectance maps, RGB reflectance maps and mixture maps. Source PSD files are also correctly searched for in the bundle folder.

    • Improved material file configuration of bump maps.

    • Several updates to tape5 parsing to improve support for both historical features and advanced options added in MODTRAN5.

      • Fixed a bug with the Card 2 VIS, WSS, RAINRT and GNDALT variables being parsed incorrectly.

      • Fixed a bug with the Card 2C2 parsing.

    • Fixed issues with null materials over water.

    • Several of the GLIST fill options were updated to use local random number generators for all aspects of object insertion.

    • Improved the error checking logic for solver requirements on proxy materials.

    • Migrated the hyper-sampling option from the adaptive pixel sampler to the central sampler, which yields more stable results and insures the truth is valid.

    • Added new features to the scene file and Scene Editor for tracking the wavelength windows appropriate for the scene and (optional) minimum and maximum GSDs for the scene.

  • LADAR/LIDAR

    • Improved the fidelity of the dark count rate (DCR) tests in the Advanced GmAPD Detector model.

    • The Advanced GmAPD Detector Model now uses the same Mersenne Twister (MT) psuedo random number generator on all three platforms. This resolves the quantization issues on Windows when low dark count rates were combined with the stock 32-bit random number generator.

  • Demonstrations

    • New Demos

      • BumpMap2 is a second bump map example with imposed slopes that can be tested.

      • MixtureMap1 shows how to use a fraction cube to define multiple materials are a given location.

      • SubPixelObject1 shows how to enable hyper-sampling in pixels containing user-defined "important objects" that are very small.

    • DIRSIG5-Specific Demos

      • NormalMap1 shows how to incorporate a normal map to introduce variations in surface normals withing otherwise flat geometry.

      • ChipMaker1 utilizes a specialized combo-plugin to streamline the workflow of making large sets of image chips for training machine learning algorithms.

      • Caustics1 utilizes new scene plugins in the DIRSIG5 core to model water surfaces and sub-surface light propagation.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.7.3.17195

Release Date: Fri Apr 28 17:00:02 EDT 2017

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • General

    • Further updates related to the simple cloud model.

    • Added initialization output for the map-based temperature solver.

    • Fixed a logic issue that caused user-defined source contributions to be unecessarily computed onto the Sun, Moon and Sky.

    • Improved the handling of material maps using "null" materials when mixing is enabled.

    • Sources can now be assigned simple "blinking" parameters (instant on/off at a user-defined frequency) (see the updated Sources4 demo).

  • LADAR/LIDAR

    • BPF3 formatted point cloud files can now be generated from the simple/basic LIDAR detector model.

    • Added the new crosstalk fill and scaling tools to the Advanced GmAPD Database Builder tool.

  • Important bug fixes (see the link below to view all the Resolved Issues)

    • Removed the debug output generated by user-defined sources that accidentally made it into the 4.7.2 final release.

    • Added a fix to catch inconsitent geometry with vertex plane normals that point in the opposite direction as vertex normals.

    • Fixed a problem with using the <basesource> mechanism in GLIST files.

    • User-defined source radiant intensity files are now correctly searched for in bundled geometry.

    • Fixed a bug where the view buttons in Bulldozer were not consistent with the default orientation expected by the scene motion models.

    • Fixed a bug with the simple/basic LIDAR detector model producing corrupt LAS point cloud files when using the Geiger-mode detector model.

    • Fixed a bug where a data-driven clock did not loop as expected.

    • Fixed a bug where a material defined in a material file as a material mapped proxy could would create an error about missing a temperature solver. Although the material shouldn’t need it and even if you added a temperature solver, the error would be generated.

  • Demonstrations

    • Improved Demos

      • The Sources1 demo was expanded to feature multiple point sources employing muliple geometry and radiometry descriptions.

      • The Sources4 demo was expanded to feature a pair of "blinking" sources.

    • New Demos

      • FastCloud1 shows how to bundle the simple cloud model in an object.

      • TemporalIntegration2 shows temporal integration bluring due to a moving platform.

      • RollingShutter1 shows bluring and artifacts in a moving object due to rolling shutter readout of a 2D array.

      • NestedMotion1 shows a hierarchy of various motion models in a single scene.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.7.2.16784

Release Date: Thu Sep 29 22:36:27 EDT 2016

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Fixed a series of bugs (#1, #2, #3 and #4) related to the simple cloud model.

  • Fixed a bug with the tracking mount correctly pointing at objects with instance offsets. In addition, the TrackingMount1 demo was improved to have two moving targets that can be tracked.

  • Fixed a bug with adjacent material mixing in materials maps.

  • Fixed a bug with solar and lunar ephemeris that resulted in using positions for the wrong day when the UTC hour offset rolled the day.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.7.1.16605

Release Date: Mon May 9 19:54:32 EDT 2016

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Changed the behavior of the attribution mechanism for OBJs via the GLIST file (see related bug).

  • Fixed a bug related to memory indexing uncovered by the OpenWater2 demo.

  • Fixed a bug with the Simple radiometry solver introducing specular effects on diffuse surfaces.

  • Fixed a bug related to material assignment issue surfaced by the RegularGrid1 demo.

  • Fixed a bug where the Scene Editor would inject spaces into material labels used in map assignments.

  • Fixed an issue with sumo2dirsig utility that would cause vehicles to "jump" related to limited precision in the SUMO network files.

  • Fixed a bug with using sub-object motion with objects that asymmetrically expand their bounding box.

  • Fixed a bug that resulted in mixture maps not working correctly.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.7.0.16452

Release Date: Thu Dec 3 21:22:19 EST 2015

This is a major release. The following features were introduced in the DIRSIG 4.7.0 release:

  • Features

    • Material labels (IDs) can now be alphanumeric, rather than strictly numeric.

      • Note that this feature may impact how some people have been attributing OBJ geometry files. Please see this bug for more information.

    • New GLIST features to enable geometry and material bundling (see the new BundledObject1 demo).

    • Improvements to details provided about the scene during load:

      • Improved output while the scene geometry and materials are loaded.

      • The new geometry_report.txt file captures the hierarchy of embedded geometry, automatically instanced geometry and material attribution.

      • The new material_report.txt file captures the mapping of global material indexes (the values captured in the updated material truth) to material labels (IDs), material names and the file the material was defined in.

    • Public release of the Advanced GmAPD Lidar toolchain.

      • A more advanced version of the Geiger-mode Avalanche Photo-diode (GmAPD) detection and point generation tool provided by the general LIDAR tool.

      • The advanced tools allow the user to provide per-pixel photon detection efficiency (PDE) and dark count rate (DCR) that are a function of operating conditions.

      • The advanced tools also allow the user to incorporate crosstalk (a feature not available in the general tool).

    • Simplified installation method for Mac OSX

      • Open the disk image and simply drag the DIRSIG4 folder into Applications or wherever you would like to install the software.

  • Important bug fixes (see the link below to view all the Resolved Issues)

    • The IDAY variable wasn’t always updated in the MODTRAN tape5 files, which would impact the Earth-Sun distance (the Sun position was correct). (External link)

    • Temporally correlated jitter values were not correctly captured in the data recorder instrument or in the LIDAR BIN file. This made it impossible to achieve ideal reconstructions of 2D or 3D imagery. (External link)

    • Atmospheric backscatter returns in LIDAR simulations were not being computed in the 4.6.x release cycle. (External link)

  • Documentation

  • Demonstrations

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.6

DIRSIG 4.6.3.15676

Release Date: Thu Jul 17 00:18:15 EDT 2015

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • An artifact (unreasonable values and gradients) in the path radiance would manifest itself across the field-of-view for exo-atmospheric instruments looking at the Earth.

  • A variety of issues related to enabling temporal oversampling of the range gate for a LIDAR sensor were resolved.

  • The ability to enable and disable various maps in the scene file via the Scene Editor was improved.

  • The issue with the progress bar not always reaching 100% when a simulation completed was resolved.

  • Temporal oversampling can now be combined with a data-driven focal plane.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.6.2.15518

Release Date: Sun May 3 18:31:51 EDT 2015

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Fixed some missing date/time stamps on probe rays used by the built-in THERM temperature solver. This would result in aborts for thermal simulations. This update also fixed a previous undiscovered bug that resulted in thermal shadows not responding to dynamic geometry.

  • Added the new Thermal2 demo to exercise how object temperatures respond to moving objects and the shadows created by them.

  • Fixed a bug related to user-defined sources that would disappear when their pointing direction was not axis-aligned.

  • Restored some methods that allowed the user to generate thermal emission when using the data-driven temperature solver without needing to trigger all thermal calculations.

  • Improved the parsing of large GLIST files, which in some cases didn’t release a large amount of memory after the XML file was parsed.

  • Fixed an issue that caused preview mode for LIDAR simulations to have no active return flux in the output BIN files.

  • Improved the parsing of DeltaMotion MOV files to address negative and zero delta time steps.

  • Fixed some initialization issues when using old DIRSIG3 era simulation descriptions.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.6.1.15063

Release Date: Tue Dec 16 15:49:20 EST 2014

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Fixed a place where rays were not being assigned valid date/time stamps. As a result, this caused scenes with any dynamic content to have artifacts or even crash (External link and External link).

  • Fixed a poor spectral bandpass and channel setup in the Polarization2 demo.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.6.0.14842

Release Date: Fri Nov 7 12:20:17 EST 2014

This is a major release. The following features were introduced in the DIRSIG 4.6.0 release:

  • New resume mode

    • A way to resume a DIRSIG simulation that stopped during a previous run.

      • Only available for the passive "simple" and "raw" capture methods at this time.

    • You can learn more about this feature in the DIRSIG command-line guide.

  • General optimizations

    • Faster geometry loading and sorting

    • Faster radiometry calculations

    • Added r-tree sorting to both static and dynamic (moving) user-defined sources, which results in nearly constant time simulations regardless of the number of sources in the scene.

  • Improved suite of "simple" radiometry tools

    • The new Simple radiometry solver

      • The new radiometry solver is much faster than the the Generic radiometry solver and much better than the Classic radiometry solver.

      • This new solver is now featured in many of the distributed demos and is the recommended solver for all new scene construction.

    • New and improved "simple" optical properties (basic 2-column data)

      • SimpleReflectance (ASCII/Text and XML input) for surface reflectance.

      • SimpleTransmission (ASCII/Text and XML input) for surface transmission.

      • SimpleAbsorption (ASCII/Text and XML input) for volume absorption.

      • SimpleScattering (ASCII/Text and XML input) for volume scattering.

  • Improvements to the adaptive sampling algorithm to minimize temporal differences in pixels with both static and dynamic content.

  • Improved version of the Ross-Li BRDF model, which now supports the "thick" vs. "thin" and "sparse" vs. "dense" formulations.

  • New units options for radiance image produced by the Basic capture method

    • Selectable area units (per m2 or per cm2)

    • Selectable flux units (watts, milliwatts, microwatts or photons/second)

  • New object instancing tools

    • Various automated object instancing tools in the GLIST file help users procedurally fill scenes with objects (see the DensityMap1 and PolyFill1 demos for more information).

    • "Decal maps" simplify the placement of objects on top of other objects (see the DecalMap1 demo for more information).

  • The initial version of Flexible motion model is officially "done" at this time.

    • This module includes tools for defining both scene (object) and platform motion. There are tools to directly use an SGP4 propagator with a two-line element (TLE), data-driven support for quaternions, and more.

    • See the Flexible Motion model guide for options, use cases and examples.

    • See the FlexMotion1 demo for more information on using it for scene content.

  • New instance truth and track extraction tool

  • New data-driven temperature solver

    • A new temperature solver we added that allows the user to specify the temperature as a function of time (see the new DataDrivenTempSolver1 demo for more information).

  • New modulating user-defined source option

    • Added support for modulating sources (see the Sources4 demo for more information).

  • New exo-atmospheric source positioning options

    • Ability to specify a fixed Sun location (zenith and azimuth) is available in the new Ephemeris tab on the Atmospheric Conditions Editor.

    • New scriptable sun location model lets users specify the location of the sun via a script (requires manual editing of the .atm file at this time).

  • Improved radar modality features (this modality is still experimental)

    • Materials properties are no longer embedded in the .platform file. The new SarReflectivity optical property model can be used via the material database file.

    • The required .platform variables have been distilled down to a minimum. The applicable section of the Radar Modality Handbook has been updated to describe the improvements.

  • Improvements to psuedo random number generation

    • Added a new command-line option to specify the global random seed.

    • Added some options to override the seed for specific random number generators associated with specific components.

  • Packaged data sets

    • Added "standard" relative spectral response (RSR) files for Si (Silicon), InSb (Indium Antimonide), and HgCdTe (Mercury Cadmium Telluride) sensors.

  • Scene Updates

    • Foxbat scene

      • Added water tower near the fuel storage area.

      • Added floodlights around the perimeter of the aircraft movement area.

    • Warehouse scene

      • Added floodlights to the rear storage yard.

  • New Documentation

  • Demonstrations

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.5

The following important changes were made in the DIRSIG 4.5.x releases that will result in different output when compared to simulations from previous releases (for example, DIRSIG 4.4.4 and older releases):

  • A "Setup Wizard" will start the first time you launch the user interface. It will guide you through a basic configuration process, including MODTRAN configuration. This wizard will only run the first time you launch the user interface with DIRSIG 4.5.

  • In previous releases, the UV projection scheme was automatically used if the source geometry included UV coordinates (for example, an OBJ file containing "vt" coordinates). In this release, those objects will not automatically switch from the "drape" projection scheme in the .scene file to the "UV" projection scheme. The user must explicitly select the "UV" projection scheme, otherwise the "drape" scheme in the .scene file will be honored.

  • In previous releases of DIRSIG, an unpolarized reflectance model (for example, the "Classic Emissivity", "Ward", "Phong", etc. models) would "preserve" polarization. Radiometrically, this behavior was deemed a poor approach and in DIRSIG 4.5 and later these optical properties will be 100% depolarizing.

  • The format of the ASCII/Text point cloud files has changed slightly. Please consult the Lidar Modality Handbook for more information.

  • Several significant change were made to user-defined (secondary) sources in the 4.5.1 release. Details about this feature and some of these changes are discussed in the User-Defined Sources Manual.

    • A bug (External link) in the code was fixed that had these sources producing radiances with the wrong units (they were off by a factor of 10,000 because of a m2 vs. cm2 factor). If users figured this out on their own and had adjusted their input INT files to compensate, then those users will will need to revert their files back to the correct units.

    • The default value for the NORMALIZE_SHAPE option was changed to TRUE. This means that older scene setups using sources that didn’t have this option specified will behave differently with 4.5.1 and all releases going forward.

Release 4.5.4.13875

Release Date: Thu May 22 22:13:34 EDT 2014

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Important bug fixes (see the link below to view all the Resolved Issues)

    • Material truth did not report the fraction for mixed materials correctly (External link).

    • Simulation progress bar did not complete as expected (External link).

    • Sign of whisk mount angles was backwards (External link).

    • Flexible motion "LookAt" orientation engine was not initialized correctly (External link).

    • Independent clock offset was not written out (External link).

    • Image file format plugins were not included on Windows (External link).

  • New features

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

Release 4.5.3.13312

Release Date: Wed Jan 2 14:05:37 EST 2014

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Important bug fixes (see the link below to view all the Resolved Issues)

    • Matlab BIN file reader did not account for time bin width (External link).

    • Task Editor crashes upon saving a new set of tasks (External link).

    • File write errors did not result in fatal error (External link).

    • Image viewer tried to automatically load images with wrong path (External link).

  • New features

    • Basic progress bar for multiple capture simulations (for example, multiple array readouts in a pushbroom collection, video collection, LIDAR collection, etc.).

    • Graphical interface support for user-defined LIDAR temporal pulse profiles was added.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

Release 4.5.2.13188

Release Date: Mon Nov 11 20:43:10 EST 2013

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Important bug fixes (see the link below to view all the Resolved Issues)

    • Memory leak when using adaptive sampling with multiple captures (frames) (External link).

    • Fixed lost geolocation info in the ENVI header for "file per capture" output schedules (External link).

    • Updated Blender plugins now work with Blender 2.4x, 2.5x and 2.6x (External link).

    • Supplied MATLAB LIDAR BIN file reading code now works with files produced since DIRSIG 4.5.x. (External link).

  • New features

    • Added a "split" tool to the Simulation Editor, which allows the user to split some simulations into multiple smaller simulations so the user can achieve pseudo parallel processing.

    • Added support for the UTM reference frame for platform orientation angles.

    • Added the option to specify a time offset for independent clocks (previously only slaved clocks could have offsets).

  • New documentation

  • New demonstrations

    • LeafStack1 (example of "leaf stacking effect" and Leaf Area Index (LAI) truth collector).

    • LidarPointing1 (shows command errors (jitter) and knowledge error impacts on 3D point clouds).

    • LidarUserPulse1 (shows how to import an user-defined temporal pulse profile).

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

Release 4.5.1.12800

Release Date: Fri Aug 9 06:02:02 EDT 2013

This release is primarily a maintenance release, which is focused on bug fixes and the addition of only minor new features.

  • Important bug fixes (see the link below to view all the Resolved Issues)

    • Multiple changes and fixes with respect to user-defined sources (External link, External link and External link).

    • Integrated channel values were always unpolarized, even when a a polarized radiance was predicted and a polarization filter was applied (External link).

    • Problems with make_adb under Windows when the MODTRAN path contained spaces (External link).

    • Adaptive sampling parameters were not reloaded into the user interface correctly for LIDAR receiver focal planes (External link).

    • Viewing a weather file would erase the weather file path from the Atmospheric Conditions Editor (External link).

    • Truth image file only contained the last capture regardless of the output file schedule (External link).

    • Temporally uncorrelated jitter was not working (External link).

    • Temporally correlated jitter editor needed lots of improvements (External link).

    • The unit tester would crash at the end under Windows (External link).

    • Trees in the Forest and Urban scene do not show up in LIDAR simulations (External link).

  • New features

    • New "Leaf Area Index" truth collector.

    • Access to the "normalize shape" option for sources in the Material Database Editor.

  • New/Improved demonstrations

    • The "Sources1" demo was improved to include a realistic point source.

  • New/Improved documentation

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

Release 4.5.0.12124

Release Date: Fri Feb 22 10:16:07 EST 2013

Summary of new features:

  • Performance improvements

    • New spectral library code greatly improves many spectral and/or polarimetric simulations:

      • On average, most simulations are now 2x faster.

      • An AVIRIS-type simulation is now 6x faster on the Foxbat scene

      • Most polarized simulations are now running 2x - 5x faster.

      • Most LIDAR simulations are 2x - 3x faster.

    • Improved geometry and motion support greatly improves scenes with lots of static and moving geometry:

      • A simulation containing a large number of moving items is 6x faster.

  • LIDAR improvements

    • Created the new LIDAR modality handbook.

    • Added the ability to define fixed or dynamically polarized transmitter and receiver components.

    • Added the ability to have more than 1 receiver focal plane array (FPA).

    • Improved "spatial response" options for LIDAR FPAs.

    • LIDAR detector model enhancements

      • Added new "photon counting" detection model which emulates the ATLAS sensor on the forthcoming ICESat-2 satellite.

      • Addition of LAS 1.3 output option for point cloud files, which can be directly loaded by several free point cloud visualization tools.

      • Improvements to ASCII/Text output option for point cloud files, including support for different geolocated coordinate systems.

  • Improved documentation

  • Truth image improvements

    • Added support for output file schedule options.

    • Added the new "abundance" truth, which allows the user to create image planes that contain the fraction of a user-defined set of materials that are contained in each pixel (one band per supplied material ID).

  • Run-time options

    • Ability to specify an output folder and file prefix when you start a simulation (improves ability to reuse .platform files).

    • Improved command-line options and syntax for both dirsig and make_adb.

  • Scene property map improvements

    • Added ability to use PNG, JPEG and GIF file formats (in addition to PGM) for most property maps.

    • Added the explicit UV map projector.

    • Added property map features to support different image origin conventions, flip vs. mirror options, etc.

  • Different image data scaling options available within the built-in image viewer tool.

  • Simplified installation and user specific settings

    • Eliminated the DIRSIG_HOME environment variable.

    • MODTRAN configuration is now stored in the users settings (no longer lost with each update) and users can configure more than one MODTRAN setup to use.

    • Windows users can now "double-click to open" most component files if they manually setup the default program for those files to be the DIRSIG editor.

    • The "visual preview" tool has been merged with the main DIRSIG editor.

  • Improved the command-line "object tool" program

    • Added significant options to manipulate and convert object geometry.

  • New Demonstrations

    • CommandedMount1 (direct command platform-relative pointing)

    • DataDriven1 (data-driven focal plane with linear and non-linear gain models)

    • ExternalTriggers1 (driving a clock with external, irregular trigger times)

    • ScriptedMount1 (platform-relative pointing via user-supplied script)

    • TabulatedMount1 (platform-relative pointing vis user-supplied data)

  • Important bugs

    • Scriptable mount is working.

    • External clock trigger mechanism is working.

Known Issues (External link to Bugzilla)

Resolved Issues (External link to Bugzilla)

DIRSIG 4.4

Release 4.4.4.11164

Release Date: Wed Aug 29 09:33:56 EDT 2012

This release is primarily a maintenance release. Here is a general list of the new features and improvements appearing in this release:

  • Updated reference documentation

  • Fixed temperature truth generation

  • Fixed global to local polarization rotations

  • Fixed INCLUDE_FILE mechanism for material database files

  • Improved functional and user-define channel response integration

  • Improved PGM header support

  • Improved support for truth file output schedules

  • New GUI weather generation tool

  • New GUI for advanced options

  • New data-driven focal plane demo with non-linear gain

Resolved Issues (External link to Bugzilla)

Release 4.4.3.10639

Release Date: Sun May 13 23:19:33 EDT 2012

This release is primarily a maintenance release. Here is a general list of the new features and improvements appearing in this release:

  • New reference documentation

  • Fix to default GLIST and ODB rotation order

  • Support for viewing exo-atmospheric objects with "Simple" and "Threshold" atmosphere models

  • Improved support for defining spectral bandpasses in nanometers

  • Improved speed when loading large ODB files

  • Improved spotlight collection wizard

  • New/Updated LIDAR demonstrations

    • LidarBounces1

    • LidarDynamicGate1

  • New/Updated RADAR demonstrations

    • SpotlightSar1

    • StripmapSar1

    • QuadPolSar1

Related Issues (External link to Bugzilla)

Release 4.4.2.9954

Release Date: Sun Jan 15 22:15:58 EST 2012

This release is primarily a maintenance release. Here is a general list of the new features and improvements appearing in this release:

  • Significant performance improvements to LIDAR simulations (~20x faster)

  • Adaptive sampling support in the Graphical User Interface (GUI)

  • Data-drive focal plane support in the Graphical User Interface (GUI)

  • Improvements to graphical "Simulation Preview" tool

  • New extended-area, directly viewable sources

  • New "Refinery" scene

  • 10 new demonstrations

    • Bayer pattern focal plane (BayerPattern1)

    • Expanded BRDF examples (Brdf1)

    • LIDAR returns from sub-pixel structures (LidarEdge1)

    • LIDAR returns from a sloped surface (LidarSlope1)

    • A geo-synchronous, exo-atmospheric "moon-like" satellite (MoonSat1)

    • A 4-camera, division-of-aperture polarization system (Polarization4)

    • A 2x2 microgrid division-of-array (focal plane) polarization system (Polarization5)

    • Expanded primitive geometry objects (PrimitiveObjects2)

    • An extended-area, directly viewable source (Sources2)

    • An advanced UV mapping example (UvMapping2)

  • Bug fixes related to using the "Classic" atmosphere model

    • Improved compatibility with MODTRAN5 2.0.0

    • Issues with platforms on space based platforms

    • Issues with platforms on the ground looking at exo-atmospheric objects

  • Scene Editor upgrades

    • New "General" tab with preview image

    • Option for implicit scene "base directory" using the location of the .scene file

    • More meta-data than just the scene "name"

  • Platform Editor upgrades

    • New tabbed layout of the focal plane editor

    • Improved data-driven detector array geometry support

Resolved Issues (External link to Bugzilla)

Release 4.4.1.8286

Release Date: Thu Mar 10 10:19:01 EST 2011

This release is primarily a maintenance release. Here is a general list of the new features and improvements appearing in this release:

  • First release to include a Windows 64-bit version

  • Improvements to correlated deviate models used for jitter

    • The frequency spectrum can now (optionally) include the phase

  • New demonstrations

    • Indoors1

    • ExtinctionProps1

  • Blender plug-ins for DIRSIG file formats

  • Various LIDAR related improvements

    • Speedups for atmospheric backscatter returns

    • Bug fix for Linear-mode APD LIDAR detector model

  • Various GUI bug fixes and improvements

  • Improvements to streamline integration with SUMO and CityEngine

    • SUMO vehicle track import utility included on all platforms

  • Simplified shared library requirements for Solaris

  • Initial MuSES support built-in for the following platforms

    • Windows 32-bit

    • Windows 64-bit

Resolved Issues (External link to Bugzilla)

Release 4.4.0.7420

Release Date: Fri Oct 15 09:28:51 EDT 2010

Summary of new features:

  • New User Interface Tools

    • Graphical simulation preview

    • Basic image viewer

    • Component browser

    • SGP4 Orbiting Platform Motion Wizard

  • Geometry Improvements

    • Added affine transform INFO option to ODB

    • Ray-trace optimization for dynamic (moving) scene geometry

    • Support for vertex normals (normal "shading") on OBJ input geometry

  • Atmosphere

    • Added the GUI for the UniformAtm model

    • User-defined MODTRAN profile support (make_adb config file) in GUI for ClassicAtm and ThresholdAtm models

    • ClassicAtm reuse ADB check in GUI runs

  • Other

    • General performance improvements

    • Flight data recorder instrument

    • Improved demos (most upgraded to SIM and new HTML index)

    • New "warehouse" scene

Resolved Issues (External link to Bugzilla)