... Kalman filter and L-band monitor [12] processing, respectively. Once operational, the CS Kalman fil-ter zero-age-of-data URE will be reduced approximately by one-half [6, 28] and theL-band monitor ... local workstations pro-vide commands and data collection between the monitor station and the MCS.The Air Force monitor stations use a 12-channel, survey-grade, all-in-viewreceiver. These receivers, ... for - warded to the MCS. All CS ground antennas are dual-threaded for system redun - dancy and integrity. The CS ground antennas have been recently upgraded tosupport S-band ranging. The S-band...