TDRS-12

TDRS-12
Spacecraft properties
TDRS-L in its payload shroud, being hoisted atop its Atlas V launcher

Mission type	Communications
Operator	NASA
COSPAR ID	2014-004A
SATCAT no.	39504
Mission duration	15 years (planned)


Bus	BSS-601HP
Manufacturer	Boeing
Launch mass	3,454 kg (7,615 lb)^[1]


Start of mission
Launch date	January 24, 2014, 02:33:00 (2014-01-24UTC02:33Z) UTC^[2]
Rocket	Atlas V 401
Launch site	Cape Canaveral SLC-41
Contractor	United Launch Alliance


Orbital parameters
Reference system	Geocentric
Regime	Geosynchronous orbit
Perigee	35,785 kilometers (22,236 mi)^[3]
Apogee	35,797 kilometers (22,243 mi)^[3]
Inclination	6.77 degrees^[3]
Period	1436.03 minutes^[3]
Epoch	January 22, 2015, 07:10:47 UTC^[3]

TDRS-12, known before launch as TDRS-L, is an American communications satellite operated by NASA as part of the Tracking and Data Relay Satellite System. The twelfth Tracking and Data Relay Satellite, it is the second third-generation spacecraft to be launched, following TDRS-11 in 2013.^[4]

Spacecraft

TDRS-12 was constructed by Boeing, based on the BSS-601HP satellite bus. Fully fueled, it has a mass of 3,454 kg (7,615 lb), with a design life of 15 years.^[1] It carries two steerable antennae capable of providing S, Ku and Ka band communications for other spacecraft, with an additional array of S-band transponders for lower-rate communications with five further satellites.^[4] The satellite is powered by two solar arrays, which produce 2.8 to 3.2 kilowatts of power, while an R-4D-11-300 engine is present to provide propulsion.^[1]^[5]

Launch

The United Launch Alliance was contracted to launch TDRS-12. The spacecraft was launched on January 24, 2014 at 02:33 UTC (21:33 local time on January 23).^[2] An Atlas V rocket was used, flying in the 401 configuration, with tail number AV-042.^[5]After launch, TDRS-12 was deployed into a high-perigee geosynchronous transfer orbit.^[6] The spacecraft raised itself into a geosynchronous orbit using its onboard propulsion system.

Gallery

References

1 2 3 Krebs, Gunter. "TDRS K, L, M". Gunter's Space Page. Retrieved 23 January 2013.
1 2 "TRDS-L Lifts Off". NASA. Retrieved January 24, 2014.
1 2 3 4 5 "TDRS-12 Satellite details 2014-004A NORAD 39504". N2YO. January 22, 2015. Retrieved January 25, 2015.
1 2 "TDRS-K Media Kit" (PDF). NASA. Retrieved January 23, 2014.
1 2 Graham, William (January 23, 2014). "ULA set to open 2014 campaign with Atlas V launch of TDRS-L". NASASpaceflight.com. Retrieved January 23, 2014.
↑ "TDRS-L Atlas V Mission Overview" (PDF). United Launch Alliance. Retrieved January 23, 2014.

Tracking and Data Relay Satellites
First generation	TDRS-1 TDRS-B TDRS-3 TDRS-4 TDRS-5 TDRS-6 TDRS-7
Second generation	TDRS-8 TDRS-9 TDRS-10
Third generation	TDRS-11 TDRS-12 TDRS-M TDRS-N
Italics denotes launch failures. Tracking and Data Relay Satellite System List of TDRS satellites

← 2013 · Orbital launches in 2014 · 2015 →
January	GSAT-14 – Thaicom 6 – CRS Orb-1 (Flock-1 × 28 · ArduSat-2 · Lituanica SAT-1 · LitSat-1 · SkyCube · UAPSat-1) – TDRS-L
February	Progress M-22M – ABS-2 · Athena-Fidus – Türksat 4A – USA-248 – GPM Core · Ginrei · KSAT-2 · INVADER · OPUSAT · STARS-II · TeikyoSat-3 · ITF-1
March	Ekspress AT1 · Ekspress AT2 – Astra 5B · Amazonas 4A – Kosmos 2494 – Soyuz TMA-12M – Shijian XI-06
April	USA-249 – Sentinel-1A – IRNSS-1B – Progress M-23M – Ofek-10 – USA-250 – EgyptSat 2 – SpaceX CRS-3 · KickSat · PhoneSat 2.5 · ALL-STAR/THEIA · SporeSat · TestSat-Lite – Luch 5V · KazSat-3 – KazEOSat 1
May	Kosmos 2495 – Ekspress AM4R – USA-251 – USA-252 – Kosmos 2496 · Kosmos 2497 · Kosmos 2498 · Kosmos 2499 – ALOS-2 · Raijin-2 · UNIFORM-1 · SOCRATES · SPROUT – Eutelsat 3B – Soyuz TMA-13M
June	Kosmos 2500 – Deimos-2 · KazEOSat 2 · Hodoyoshi 3 · Hodoyoshi 4 · AprizeSat 9, 10 · BRITE-Montreal · BRITE-Toronto · BugSat 1 · SaudiSat-4 · TabletSat-Aurora · UniSat-6 (AeroCube-6 · ANTELSAT · Lemur-1 · Tigrisat) · DTUSat-2 · Duchifat-1 · NanoSatC-Br 1 · PACE · Perseus-M × 2 · PolyITAN-1 · POPSAT-HIP-1 · QB50P1 · QB50P2 · Flock-1c × 11 – SPOT 7 · CanX-4 · CanX-5 · AISat · VELOX-I
July	OCO-2 – Gonets-M No. 8, 9, 10 – Meteor-M 2 · AISSat-2 · DX-1 · Relek · SkySat-2 · TechDemoSat-1 · UKube-1 – O3b × 4 (FM3, FM6, FM7, FM8) – CRS Orb-2 (Flock-1b × 28 · TechEdSat-4) – Orbcomm-2 × 6 – Foton-M No.4 – Progress M-24M – USA-253 · USA-254 · USA-255 – Georges Lemaître ATV
August	USA-256 – AsiaSat 8 – Yaogan 20 A, B, C – WorldView-3 – Gaofen 2 · Heweliusz – Galileo FOC-1 · Galileo FOC-2
September	Chuangxin 1-04 · Lingqiao – AsiaSat 6 – Yaogan 21 · Tiantuo 2 – MEASAT 3b · Optus 10 – USA-257 – SpaceX CRS-4 – Soyuz TMA-14M – Olimp-K – Shijian XI-07
October	Himawari 8 – IRNSS-1C – Intelsat 30 · ARSAT-1 – Yaogan 22 – Ekspress AM6 – Chang'e 5-T1 · 4M – Shijian 11-08 – Cygnus CRS Orb-3 (Arkyd-3 · Flock-1d × 26 · GOMX-2 · RACE) – Progress M-25M – USA-258 – Meridian 7
November	Sasuke · Hodoyoshi 1 · Kinshachi 1 · Tsukushi · Tsubame – Yaogan 23 – Yaogan 24 – Kuaizhou 2 – Soyuz TMA-15M – Kosmos 2501
December	Hayabusa 2 · PROCYON · Shinen 2 · DESPATCH – Orion EFT-1 – DirecTV-14 · GSAT-16 – CBERS-4 – Yaogan 25 A, B, C – USA-259 – Yamal-401 – O3b × 4 (FM9 to FM12) – Kondor-E No.2 – IPM – Kosmos 2502 – Resurs-P No.2 – Yaogan 26 – Astra 2G – Fengyun 2-08
Launches are separated by dashes ( – ), payloads by dots ( · ). Manned flights are bolded. Launch failures are in italics. Payloads deployed from other spacecraft are (enclosed in brackets).

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