Milstar 3

 1999-023A

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Milstar F3, the first Milstar 2, was the first to carry an MDR (medium data rate) payload as well as the LDR. EHF, SHF and UHF coverage. Mass is 4500 kg. Size is 15.5m long 35m span.

Titan 4 B-32 took off from pad 40 at the Cape on 1999 Apr 30, launched by 45SW/3SLS. The vehicle had a 76' fairing. An incorrect constant in the flight software, the roll rate filter constant, was set to -0.199 instead of -1.99, causing extra rolls during the first Centaur burn, depleting the RCS fuel for later burns. SOC-42 control deployed the solar arrays and payload truss wings.

Milstar F3
Date	Time	Event	Orbit
1999 Apr 30	1630	Launch by Titan 4 B-32/TC-14	CC LC40
		T+2:10 Stage 1 burn
		T+2:25 SRMU sep
		T+3:33 Fairing sep
		T+5:25 Stage 2 burn
		T+5:25 Stage 1 sep
		T+9:06 Stage 2 MECO
		T+9:15 Stage 2 sep
	1639	T+9:36s Centaur TC-14 MES-1
	1641	T+11:39s MECO-1	150 x 707? x 28.3
	1735?	T+1:05:01? MES-2
	1740?	T+? MECO-2
	1900?	Centaur TC-14 sep	148.8 700 x 5169 x 28.2
1999 May 6		Orbit raise burns begin
1999 May 10		Orbit raise burns end	153.5 1091 x 5162 x 28.2
1999 May 12		end of ops
Planned
		T+1:05:42 MES-2
		T+1:10:54 MECO-2
		T+6:22:30 MES-3
		T+6:24:41 MECO-3
		T+6:34:54 Centaur sep

Payload:

• -X wing

  • MDR payload, 32 channels

  • Crosslink antenna

  • Thrusters

  • MDR nulling antennas, 2

  • MDR DUC distribution user coverage antennas, 3

• +X wing

  • Crosslink antenna

  • Thrusters

  • LDR payload (low data rate), 192 channels

  • EHF uplink 44 GHz

  • SHF downlink 20 GHz

  • SHF Agile beam antennae

  • EHF agile antennae

  • EHF Earth Coverage

  • NSB1 narrow spot beam

  • NSB2 narrow spot beam

  • WSB wide spot beam

  • AFSATCOM IIR payload (UHF, 4 channels)

  • Fleet Broadcast channel, UHF

  • UHF transmitters (2)