Constellation Satellite Design - Science topic

how far can i take gravity assist manoeuvre and how it works?

Dear all, I'd like to open here a sort of forum for understanding how the geodesists community is moving in view of the X-band SAR satellite constellation. The new constellation will offer new "free, near real-time SAR data" with the "latest information about any spot on the planet within the hour". This will open completely new horizons for InSAR monitoring of ground deformation especially for rapid phenomena such as eruptions and seismic crises. The huge amount of so frequent data acquisitions will open also new needs for rapid and automatic processing. My question are: who knows more? Are you planning a routine use of these data? How?

Hello. I am trying to understand which is the minimum revisit time for precision agriculture purposes. I am aware that each crop and each physical parameter in the crop requires different revisit time, but if you could adress me to some paper or work that explains how they select the revisit time for at least one parameter in a crop, I would be gratefull. (Just to specify, I am referring to revisit time of a satellite). Thanks. Let me know if I wasn't clear enough.

When creating a scenario in order to analyze a link budget in the case of ISL, what would be the given criteria to stablish Tx gain, Rx gain, Power transmitted and the rest of the system parameters for a given link between two satellites in different orbit planes?

I'm looking for information on the size of the global satellite industry - both commercial and whatever information is available on government. I'd like to know more about the number of satellites in the various orbits, number of geosynchronous satellites, construction and launch cost data, and potential future uses.

My aim is to design a LEO constellation to have regional cover.The number of satellite is 12 so my network has inter satellite link sometimes. But I do not know the typical frequency that ISL works at. And how to calculate the ISL budget. The other question is how can I simulate ISL and which software is useful? 

Thanks

When I move all pixel linearly computer vision optical flow method doesn't give linear movement of all pixel. Example, when I shift all pixel in [10  10]. It doesn't give me correct answer for all pixel.

All (according to my knowledge) GPS satellite planning software calculate satellite number and DOP's in one point (position). Do you know any software solution for constellation planning along the line (for example - 50 km of railroad) which is passed (for example - 5 hours)?

I want to model a NGEO satellite constellation with terrestrial networks so i need to know some routing algorithms.

SCIAMACHY which is onboard the Envisat has 3 different modes of measurements. (link : http://www.iup.uni-bremen.de/sciamachy/instrument/modes/index.html) . In Nadir it is easy to understand that location is beneath the sensor. But in limb or occultation mode if we consider some measurements what location does they belong to (in the sense geo-location of the measurement) as the measurements here are tangent to atmosphere.