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Maintenance Release

To install an STK Maintenance Release, download the maintenance release for your operating system. For the PC, the download is a self-extracting zip.

STK 8.1
Product Date Platform Size Description
STK 8.1 Maintenance Release 3* 02/06/08 PC 40.2 MB Release Notes
DSim Maintenance Release 1*** 02/06/08 PC 9.7 MB  
STK 8.1 Maintenance Release 2* 12/10/07 PC 18.3 MB Release Notes
STK/Analyzer
Maintenance Release 2**
12/10/07 PC 67.3 MB  
TIREM for STK/Communications and STK/Radar Maintenance Release 2** 12/10/07 PC 1.03 MB  
STK Java API 8.1 Maintenance Release 2 12/10/07 PC 14.4 MB Optional STK Java API
STK 8.1 Maintenance Release 1* 10/2/07 PC 13.2 MB Release Notes

* STK/Space Environment and STK/Radar Advanced Environment users who wish to update these products to the latest maintenance release should call AGI customer support 1.888.785.9973 to request new CDs, as these products are ITAR controlled and cannot be downloaded.

** STK/Analyzer and TIREM for STK/Communications and STK/Radar are no longer included with STK installs and patches. To update these products, first install the associated STK maintenance release and then install the individual Analyzer and/or TIREM maintenance releases. Customers may also call AGI customer support 1.888.785.9973 to request new CDs.

*** DSim is not included with the STK 8.1.3 maintenance release patch posted above and must be installed separately. If you are a DSim customer or wish to evaluate DSim first install the STK 8.1.3 maintenance release and then install the individual DSim maintenance release. Customers may also call AGI customer support 1.888.785.9973 to request the STK 8.1.3 install CD which includes the DSim install.


STK 8.0
Product Date Platform Size Description
STK 8.0 Maintenance Release 2* 02/22/07 PC 15.1 MB Release Notes
STK 8.0 Maintenance Release 1* 12/15/06 PC 10.0 MB Release Notes

* STK/Space Environment and STK/Radar Advanced Environment users who wish to update these products to STK 8 MR 1 should call AGI customer support 1.888.785.9973 to request new CDs, as these products are ITAR controlled and cannot be downloaded.

Please call AGI to receive a new version of your software.


STK 7.1
Product Date Platform Size Description
STK 7.1 Maintenance Release 1* 07/07/06 PC 12.0 MB Release Notes

* STK/Space Environment and STK/Radar Advanced Environment users who wish to update these products to STK 7.1 MR 1 should call AGI customer support 1.888.785.9973 to request new CDs, as these products are ITAR controlled and cannot be downloaded.

Please note you will need to have STK 7.1 to complete the STK 7.1 Maintenance Release update.

Please call AGI to receive a new version of your software.


STK 7
Product Date Platform Size Description
STK 7 Maintenance Release 1* 02/17/06 PC 16.0 MB Release Notes

* STK/Space Environment and STK/Radar Advanced Environment users who wish to update these products to STK 7 MR 1 should call AGI customer support 1.888.785.9973 to request new CDs, as these products are ITAR controlled and cannot be downloaded.

Please call AGI to receive a new version of your software.


STK 6.2, 6.1, 6.0, 5.0 and STK 4.3 Maintenance Releases
Launch STK 8

User Testimonials
"ASRC uses STK and several of AGI's advanced STK modules regularly to support our work. I have talked to several of AGI's tech support staff members over the last few months and always find them very friendly and helpful. In short - we love AGI and STK!"
— Erica Lieb

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