Indian Defence Cyber Agency & Defence Space Agency : Updates and Discussions

Speedster1 said:
The goal is likely to cover the whole of IOR and supplement manned P-8Is in the ISR role. So there will likely be a whole constellation of these birds. Let's see.
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A constellation?
36 is the minimum number (12 triplets) in a 1000km orbit, if you can make do with a few minutes (15-20) between the coverage interval. Since you want to be lower to be able to detect faint signals, the number goes up significantly.
Further, you wouldn't want to give the target an opportunity to time the arrival of satellites, and maintain constant coverage, the required number is at least 3x higher.

I don't see anyone willing to invest that much effort or money. It'll be a token number which will be self-defeating because the enemy will know when those satellites will be in detection range, they'll simply have to wait out their pass and then transmit.

It's all or nothing.
 
Choice_of _inevitability said:
A constellation?
36 is the minimum number (12 triplets) in a 1000km orbit, if you can make do with a few minutes (15-20) between the coverage interval. Since you want to be lower to be able to detect faint signals, the number goes up significantly.
Further, you wouldn't want to give the target an opportunity to time the arrival of satellites, and maintain constant coverage, the required number is at least 3x higher.

I don't see anyone willing to invest that much effort or money. It'll be a token number which will be self-defeating because the enemy will know when those satellites will be in detection range, they'll simply have to wait out their pass and then transmit.

It's all or nothing.
Click to expand...

The key is the payload, imo. If DRDO can develop a lightweight, high bandwidth ELINT sensor, they could be fitted to virtually any small sat bus including those from pvt cos like Pixxel or Galaxye. Those companies already have the scale and integration experience.
 
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RationalGuy said:
What about for LaC and Pak?
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Imo, EMISAT should theoretically be capable of tracking both ground and naval emitters. Since it is based on a mini satellite bus, I'd say it was always meant to be a constellation.
Don't know what the hold up is with that prog but perhaps DRDO is moving to next gen payloads under the Samooha project. Reportedly the pvt sector is being roped in for it as well.
 
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