Slide 36 of 56
Notes:
The LBA, JSTARS, and A2C2S all share the same AFAPD net. A2C2S can receive AFAPD messages from both the JSTARS and the LBA
SIS will be used to display the AFAPD targets from LBA. AFAPD messages that will be received and displayed by A2C2S are:
Free text, FCR targets all, Shot at, Present Position
NRL (Mark Powell) owes MAJ Burden an estimate for the cost to modify SIS to do the following:
- generate AFAPD messages to send to LBA
- convert AFAPD messages to JVMF messages
The commercial ADSI product understands only a selected subset of AFAPD messages called “Suppression of Enemy Air Defenses” (SEAD) messages. It can both receive and transmit these messages. It does so over an Air Force-type IDM, which does most of the AFAPD protocol handling work. An Air Force IDM is smarter than an Army IDM. In particular, the Longbow mission computer handles the AFAPD message formatting functions and the IDM is simply a “dumb modem” that couples to the HAVEQUICK radio.
The commercial ADSI product does NOT currently understand the FCR Target All, Shot At, Present Position, and Free Text message types that A2C2S desires. Incidentally, the choice of these messages apparently derives from the message types used during TF XXI.
SIS for the A2C2S is a customization of ADSI. Among these customizations was porting to the Windows NT operating system and provisions to talk to the JCIT and ATCCS applications over Ethernet. The commercial ADSI talks to the Air Force IDM over 1553. Since NRL/ATC requested Ethernet, APC did not port over any of the AFAPD-related functionality. NRL/ATC had not requested this, since at the time they put APC under contract, certain technical and financial issues were unclear. NRL/ATC have since obtained a quotation for accommodating the AFAPD messages within SIS. They also anticipate some increased effort in porting the “smart” aspects of the Air Force-style IDM to JCIT.
