If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#21
|
|||
|
|||
"Harry Andreas" wrote in message ... In article , "Tarver Engineering" wrote: "Harry Andreas" wrote in message ... Keep that basket small. If your system has enough bandwidth you can update the weapon all the way to the target and at the terminal point it's within the CEP of the blast effect for the particular weapon you've selected. Obviously the 2000lb JDAM requires less bandwidth for a given target. Also obviously the performance of your SAR, GPS receiver, and datalink are crucial. So far the GPS/Data link combination has performed at less than expected levels. I havn't seen anything good about the Navy plan to replace TACAN with GPS/Data link and FAA just killed the LAAS landing system. The JSF GPS receiver is significantly better than anything else on the market. We'll be delivering the first EMD in September. Google JPALS. http://www.ainonline.com/issues/06_0...electsp94.html As you can see by reading the URL, other differential GPS systems have happy press releases, while often producing less than adaquate results. For military style systems, the binary satellite provides 0.2 meter accuracy without augmentation in the longitudinal reference frame. Altitude may altentaively be resolved using the TWAS data base and thereby eliminates the error WGS-84 error documented in RTCA DO-208 change 3. UPSAT has demonstrated same with the CNX-80 using civil codes, optional improvement for WAAS augmentation shows only a small advantage. (VNAV) |
#22
|
|||
|
|||
"Tarver Engineering" wrote ...
As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Actually, data link is NOT a hard requirement. There have been several initiatives in work for many years on autonomous terminal seekers -- TLAM is one significant example, though it may not have used GPS. I worked with some relevant JSOW (then AIWS) P3I proposals at TI and a couple other places back in '90 and '91. Irrelevent. GPS with FOG does all that already. I see... In your fantasy world, TLAM and JSOW are "irrelevant" in the context of GPS guided weapons with terminal seekers, and so is the funded research in the JSOW Preplanned Product Improvement program... What current weapon[s] use[s] "GPS with FOG" and "does all that already"? BTW, what is your definition of FOG in context? The gnomes at China Lake couldn't make FOG-S (Fiber Optic Guided Skipper) work well enough for operational use after many years of pork-barrel supported work... |
#23
|
|||
|
|||
"John R Weiss" wrote in message ... "Tarver Engineering" wrote ... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Actually, data link is NOT a hard requirement. There have been several initiatives in work for many years on autonomous terminal seekers -- TLAM is one significant example, though it may not have used GPS. I worked with some relevant JSOW (then AIWS) P3I proposals at TI and a couple other places back in '90 and '91. Irrelevent. GPS with FOG does all that already. I see... In your fantasy world, TLAM and JSOW are "irrelevant" in the context of GPS guided weapons with terminal seekers, and so is the funded research in the JSOW Preplanned Product Improvement program... What current weapon[s] use[s] "GPS with FOG" and "does all that already"? BTW, what is your definition of FOG in context? The gnomes at China Lake couldn't make FOG-S (Fiber Optic Guided Skipper) work well enough for operational use after many years of pork-barrel supported work... Fibre Optic Gyro. |
#24
|
|||
|
|||
"Tarver Engineering" wrote...
As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Actually, data link is NOT a hard requirement. There have been several initiatives in work for many years on autonomous terminal seekers -- TLAM is one significant example, though it may not have used GPS. I worked with some relevant JSOW (then AIWS) P3I proposals at TI and a couple other places back in '90 and '91. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. GPS with a gyro of any kind does not make for post-launch reprogramming or retargeting of the weapon. |
#25
|
|||
|
|||
"John R Weiss" wrote in message ... "Tarver Engineering" wrote... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Actually, data link is NOT a hard requirement. There have been several initiatives in work for many years on autonomous terminal seekers -- TLAM is one significant example, though it may not have used GPS. I worked with some relevant JSOW (then AIWS) P3I proposals at TI and a couple other places back in '90 and '91. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. GPS with a gyro of any kind does not make for post-launch reprogramming or retargeting of the weapon. That is true. |
#26
|
|||
|
|||
"John R Weiss" wrote "Tarver Engineering" wrote... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Actually, data link is NOT a hard requirement. There have been several initiatives in work for many years on autonomous terminal seekers -- TLAM is one significant example, though it may not have used GPS. I worked with some relevant JSOW (then AIWS) P3I proposals at TI and a couple other places back in '90 and '91. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. GPS with a gyro of any kind does not make for post-launch reprogramming or retargeting of the weapon. AMSTE (Affordable Moving Surface Target Engagement) uses a post-release data link to compensate for the long time of flight of the ballistic weapon used (JDAM). The current AMSTE test series has demonstrated fair success against soft targets using JDAM unaided by an imager. An imaging seeker is planned for use against hard targets like armor. The DAMASK (Direct Attack Munition Affordable Seeker) imaging seeker is one of the candidates to serve in that role. In order to make the DAMASK seeker affordable (a key parameter in the JDAM-related electronics), several performance parameters were kept modest. Because the intended application (JDAM) has a small, 10m CEP, the IR Seeker doesn't need either a wide FOV or high resolution. If a higher performance IR seeker were used, allowing lock-on prior to release, then yes a data link would not be needed. But you don't have an "affordable" weapon then. But the USAF has gotten religion on the affordability of weapons and within that family, cost is an equal priority with performance. |
#27
|
|||
|
|||
"Paul F Austin" wrote in message . .. "John R Weiss" wrote "Tarver Engineering" wrote... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Actually, data link is NOT a hard requirement. There have been several initiatives in work for many years on autonomous terminal seekers -- TLAM is one significant example, though it may not have used GPS. I worked with some relevant JSOW (then AIWS) P3I proposals at TI and a couple other places back in '90 and '91. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. GPS with a gyro of any kind does not make for post-launch reprogramming or retargeting of the weapon. AMSTE (Affordable Moving Surface Target Engagement) uses a post-release data link to compensate for the long time of flight of the ballistic weapon used (JDAM). We already discussed that and Weiss just wanted to argue. |
#28
|
|||
|
|||
"Tarver Engineering" wrote...
"Tarver Engineering" wrote... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. AMSTE (Affordable Moving Surface Target Engagement) uses a post-release data link to compensate for the long time of flight of the ballistic weapon used (JDAM). We already discussed that and Weiss just wanted to argue. Actually I wanted to debunk your inaccurate claims regarding a "require[d]" data link and some "GPS with FOG" system that "does all that already." While data link is one method to accomplish the mission, there are other methods in development, and have been for many years. From Paul's description of the current state of AMSTE, it does not appear to yet be ready for deployment in a CAS scenario. Maybe it will get there; maybe not. Maybe we will have to spend the $$ for a true autonomous terminal seeker for those situations where risk to the troops is too high for non-terminally-guided weapons and/or data link is not an option. |
#29
|
|||
|
|||
"John R Weiss" wrote in message ... "Tarver Engineering" wrote... "Tarver Engineering" wrote... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. AMSTE (Affordable Moving Surface Target Engagement) uses a post-release data link to compensate for the long time of flight of the ballistic weapon used (JDAM). We already discussed that and Weiss just wanted to argue. Actually I wanted to debunk your inaccurate claims regarding a "require[d]" data link and some "GPS with FOG" system that "does all that already." You just made up what you wrote, so just calm down and shut up. |
#30
|
|||
|
|||
While data link is one method to accomplish the mission, there are other methods
in development, and have been for many years. Can you be any more vague? Try limiting your posts to just one or two verifyable facts and fill the rest with the fog of uncertainty. -- Venik www.aeronautics.ru "John R Weiss" wrote in message ... "Tarver Engineering" wrote... "Tarver Engineering" wrote... As the rest of the thread up to this point indicates, there is a desire to redirect a GPS guided munition post launch. The means to reprogram the munition would require some data link. Irrelevent. GPS with FOG does all that already. Fibre Optic Gyro. AMSTE (Affordable Moving Surface Target Engagement) uses a post-release data link to compensate for the long time of flight of the ballistic weapon used (JDAM). We already discussed that and Weiss just wanted to argue. Actually I wanted to debunk your inaccurate claims regarding a "require[d]" data link and some "GPS with FOG" system that "does all that already." While data link is one method to accomplish the mission, there are other methods in development, and have been for many years. From Paul's description of the current state of AMSTE, it does not appear to yet be ready for deployment in a CAS scenario. Maybe it will get there; maybe not. Maybe we will have to spend the $$ for a true autonomous terminal seeker for those situations where risk to the troops is too high for non-terminally-guided weapons and/or data link is not an option. |
Thread Tools | |
Display Modes | |
|
|