IARU Amateur Satellite Frequency Coordination

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RAX-2 Updated: 20 Oct 2011   Responsible Operator James Cutler KF6RFX
Supporting Organisation University of Michigan  
Contact Person jwcutler@umich.edu.nospam  
Headline Details: The primary objective for the RAX mission is to study the formation of FAI in the lower portion of the polar ionosphere. To characterize these anomalies, a ground-based radar transmitter will be used in conjunction with the space-based receiver onboard RAX to measure FAI intensity, altitude distribution, and degree of alignment to the magnetic field. This ground-based radar (called the Poker Flats Incoherent Scatter Radar, or PFISR) will transmit RF pulses into the ionosphere to be scattered off the FAI structures. The received signal magnitude and phase will be recorded, processed, and downloaded for analysis by the mission science teams. This process will repeat daily for approximately one year of science operations. In addition to studying FAI, the secondary objective is to use the wide-band science receiver to characterize ambient RF emission levels in the 430-434 MHz and 437-438 MHz portions of the UHF band as a function of position and time over the United States. This information will be of particular benefit to amateur satellite service coordinators who are charged with coordinating frequencies for the numerous spacecraft operating in Low Earth Orbit. Because of the large ground coverage area, this information can also be beneficial to terrestrial coordinators as well. Identifying portions of the band with excessive RF noise will help coordinators assign frequencies clear of potentially harmful interference within the amateur service. These measurements will be made at the conclusion of the primary mission with potential to be conducted during breaks in primary mission operations. As with all data collected during this mission (including telemetry and mission science results), these measurements will be published and easily accessed by the amateur radio community at large on our website at http://rax.engin.umich.edu/ A 3U cubesat with a coordinated downlink on 437.345MHz. Also planning a spread spectrum transceiver in the 2.4GHz band. Launch planned with Aubiesat, MCubed, Explorer-1 Prime and DICE on October 28th 2011 from Vandenburg into a 810x330km 101 degree orbit.
Application Date: 01 Jul 2011   Freq coordination completed on 20 Aug 2011

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