IARU Amateur Satellite Frequency Coordination

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CUSat Updated: 19 Jun 2013   Responsible Operator James Lloyd
Supporting Organisation Cornell Univ Space Systems Lab  
Contact Person gs@cusat.cornell.edu.nospam  
Headline Details: An updated proposal: After launch and Launch Vehicle separation, the satellite will enter its initialization state. During initialize, the satellite will begin a self-check process to detect any malfunctioning systems. The satellite will then use carrier-phase differential GPS data to converge on an attitude estimate. CDGPS is a new technique for performing centimeter-level accurate position determination. Once the attitude estimate for the satellite is determined, the satellite will use its on-board cameras to take images of the Earth, Moon, bright stars, and the ISON comet (C/2012 S1) which will be reaching perihelion in November 2013. If we are able to take pictures bright stars, then we should be able to determine the attitude of the satellite to help verify the CDGPS estimate of the attitude. The satellite will then telemeter down mission data to Ground Segment. This data consists of images, GPS data, Telemetry, and Command and Data Handling logs. The satellite maneuvesr so that the antenna is always pointed towards the Ground Segment during data transfer. After all necessary pictures are taken, we will perform test maneuvers using our pulse plasma thrusters. First, we will tilt the spin angular momentum. We do not want to change the magnitude, only the direction of this vector. Secondly, we will raise and lower our orbit of the satellite. In order to raise or lower the orbit, CUSat needs to fire its PPT thrusters in the direction, or against the direction of its velocity, respectively.The spacecraft will use a 2 watt transmitter on 437.405MHz using 1k2 packet. Planning a SpaceX launch from Vandenberg into a 1500x325km 80 degree inc orbit. Other passengers include Cassiope and Dande For more details see http://cusat.cornell.edu/docs/IARU/ ** A frequency of 437.405MHz has been coordinated**
Application Date: 21 May 2013   Freq coordination completed on

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