Range Instrumentation

The RTS telemetry ground stations are located on the islands of Kwajalein, Roi-Namur, Illeginni, and Gagan. These locations provide a varied tracking geometry for reentry orbital, post-impact, and launch operations. Kwajalein and Roi-Namur locations have single-channel conical-scan 1700 to 2400 MHz receiving antenna systems with 2200 to 2400 MHz auto-track capability. A summary of antenna and equipment specifications is presented in table below.

The Kwajalein and Roi-Namur facilities are capable of demultiplexing and decommutating most standard telemetry signals. In addition, both Kwajalein and Roi-Namur sites are capable of decommutating data of vehicle trajectory for range safety.

Reliable reception, recording, and processing of telemetered flight data is a critical component of RTS mission support.

Map of locations of TM Stations

**Telemetry Antenna Summary**
Antenna Diameter	*Gain(dB) @ 2.25 GHz**	Ts (K°)	G/T	3 dB beamwidth (deg)	Frequency (GHz)
Kwajalein No.1 (3m)	34	175	11.0	3.0	1.7 - 2.4
Kwajalein No.2 (3m)	34	175	11.0	3.0	1.7 - 2.4
Kwajalein No.3 (3m)	34	175	11.0	3.0	1.7 - 2.4
Kwajalein No.4 (5m)	38.5	175	16	1.8	1.7 - 2.4
Kwajalein No.5 (7m)	41.0	350	18.5	1.3	1.7 - 2.4
Roi No. 1 (3m)	32.9	175	11.0	2.8	1.7 - 2.4
Roi No. 2 (3m)	32.9	175	11.0	2.8	1.7 - 2.4
Roi (5m)	36.4	175	16.0	1.75	1.7 - 2.4
Roi (7m)	41.0	350	18.5	1.3	1.7 - 2.4
Gagan 1, 2, 3	18.5	350	-7.5	15	2.2 - 2.4
Gagan 4	15.0	350	-12	30	2.2 - 2.4

**Telemetry Site Summary**
Kwajalein Telemetry Station The Telemetry (TM) ground station at Kwajalein includes three stationary and two portable S-band auto-tracking antennas with associated tracking aids, and S-band and L-band receive and record system, a data separation and display system, and a data distribution system. The ground stations is capable of receiving, recording, and processing PCM/FM, PCM/FM/FM, FM/FM, PM, BPSK, QPSK, and FM. Other auxiliary equipment for mission support includes timing, communications, and specific and general-purpose test equipment.	Roi-Namur Telemetry Station The TM station at Roi-Namur consists of four 2200 to 2400 MHz auto-tracking antenna systems, an S-band and L-band receive and record system, a data separation and display system, and a data distribution system. The station is capable of receiving and recording all standard IRIG, PCM/FM, PCM/FM/FM, FM/FM, PM BPSK, QPSK, and FM modulations. Ancillary equipment for station support includes timing, communications, and test equipment.	GaganPost Impact TM System (PITS) The S-band signals from the three post-impact disk-on-rod cone antennas and one dual-polarized antenna on Gagan are sent over a fiber-optic link to the KTC located in the KMCC on Kwajalein.	Illeginni PITS System The Telemetry Illeginni PITS System receives wideband TM data signals in the 2200 to 2400 MHz band via an omni-directional antenna. the received signals are sent over a fiber optic system to Roi-Namur for receiving and recording.

Kwaj Telemetry Ground Station (Telemetry Hill)

RTS Telemetry Site Timing
Telemetry sites at RTS are capable of recording a variety of IRIG format serial time codes as described in IRIG document 200-89. The existing capabilities at all sites are:

IRIG A	1000 pulses-per-second Binary Coded Decimal (BCD) time of year provided as pulse width coded (level shift) format A002 time code and sine wave, amplitude modulated format A132 time code (10KHz carrier, 0.1 millisecond resolution.
IRIG B	100 pulses-per-second BCD time of year provided as pulse width coded (level shift) format B002 time code and sine wave, amplitude modulated format B122 time code (1KHz carrier, 1 millisecond resolution)
IRIG E	10 pulses-per-second BCD time of year provided as pulse width coded (level shift) format E002 time code and sine wave, amplitude modulated format E122 time code (1KHz carrier, 1 millisecond resolution)
IRIG G	10,000 pulses-per-second BCD time of year provided as sine wave, amplitude modulated format G142 time code (1KHz carrier, 0.01 millisecond resolution)
IRIG H	1 pulse-per-second BCD time of year provided as pulse width coded (level shift) format H002 time code and sine wave, amplitude modulated format H122 time code (1KHz carrier, 1 millisecond resolution)

In addition to serial IRIG format time codes, parallel binary (17bps and 20 bits per microsecond) and BCD signals are available at each site. A variable complement of pulse rates is also available at each site.