ISR - Phil Erickson, MIT/Haystack Observatory. (2013)

The period of Incoherent Scatter Radar (ISR) observation extended between 12:42 UT May 6th and 19:47 UT May 8th, 2013. The Millstone Hill (MH) ISR system contains two radar dishes with one (the Zenith beam) having fixed pointing at an 88° beam elevation, and the other pointed parallel-B (MISA: the MH Steerable Antenna), with an azimuth angle of 165.8° and an elevation angle of 66.26°, at an altitude of 250 kilometers based on the IGRF epoch 2013.34 model. The two beams are separated by 132 km at 300 km altitude. A single transmitter switches between the two antennas with a 6 minute 32 second cadence. Both dishes have an integration time of 3 minutes within that interval. The data have a range of ~100 km to ~980 km from MH. Processing done by the Haystack Observatory consisted of pulse decoding and clutter subtraction.