USA-145

American navigation satellite used for GPS

USA-145
Spacecraft properties
A Block IIR GPS satellite

Mission type	Navigation
Operator	US Air Force
COSPAR ID	1999-055A^[1]
SATCAT no.	25933^[1]
Mission duration	10 years (planned)^[2]


Spacecraft type	GPS Block IIR^[2]
Bus	AS-4000^[2]
Manufacturer	Lockheed Martin^[2]
Launch mass	2,032 kilograms (4,480 lb)^[2]


Start of mission
Launch date	7 October 1999, 12:51:01 (1999-10-07UTC12:51:01Z) UTC
Rocket	Delta II 7925-9.5, D275^[3]
Launch site	Cape Canaveral SLC-17A^[3]


Orbital parameters
Reference system	Geocentric
Regime	Medium Earth (Semi-synchronous)
Perigee altitude	20,096 kilometers (12,487 mi)^[4]
Apogee altitude	20,267 kilometers (12,593 mi)^[4]
Inclination	53 degrees^[4]
Period	717.96 minutes^[4]

USA-145, also known as GPS IIR-3 and GPS SVN-46, is an American navigation satellite which forms part of the Global Positioning System. It was the third Block IIR GPS satellite to be launched, out of thirteen in the original configuration, and twenty one overall. It was built by Lockheed Martin, using the AS-4000 satellite bus.^[2]

USA-145 was launched at 12:51:01 UTC on 7 October 1999, atop a Delta II carrier rocket, flight number D275, flying in the 7925-9.5 configuration.^[3] The launch took place from Space Launch Complex 17A at the Cape Canaveral Air Force Station,^[5] and placed USA-145 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37FM apogee motor.^[2]

By 10 November 1999, USA-145 was in an orbit with a perigee of 20,096 kilometers (12,487 mi), an apogee of 20,267 kilometers (12,593 mi), a period of 717.96 minutes, and 53 degrees of inclination to the equator.^[4] It is used to broadcast the PRN 11 signal, and operated in slot 2 of plane D of the GPS constellation;^[6] however, it had been moved to slot 5 by 2011, with USA-71 covering slot 2. The satellite has a mass of 2,032 kilograms (4,480 lb), and a design life of 10 years.^[2] As of 2019 it remains in service.

GPS IIR-3 was originally intended to use satellite SVN-50; however, it was damaged during launch preparations in May 1999 after rainwater leaked into the cleanroom atop SLC-17A where the satellite was being attached to its rocket.^[6] SVN-50 was repaired and launched as GPS IIR-21, becoming the last IIR to fly.

References

^ ^a ^b "Navstar 46". US National Space Science Data Center. Retrieved 11 July 2012.
^ ^a ^b ^c ^d ^e ^f ^g ^h Krebs, Gunter. "GPS-2R (Navstar-2R)". Gunter's Space Page. Retrieved 11 July 2012.
^ ^a ^b ^c McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 11 July 2012.
^ ^a ^b ^c ^d ^e McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 11 July 2012.
^ McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 11 July 2012.
^ ^a ^b Wade, Mark. "Navstar". Encyclopedia Astronautica. Archived from the original on November 11, 2002. Retrieved 11 July 2012.

NAVSTAR Global Positioning System satellites

List of GPS satellites

Block I

1
2
3
4
5
6
7†
8
9
10
11

Block II

Block IIA

Block IIR

1†
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

Block IIRM

Block IIF

Block III

Block IIIF

Italics indicate future missions. Signs † indicate launch failures.

v t e ← 1998 Orbital launches in 1999 2000 →
January	Mars Polar Lander ROCSAT-1
February	Stardust Globalstar 23, Globalstar 36, Globalstar 38, Globalstar 40 Telstar 6 JCSAT-6 Soyuz TM-29 ARGOS, Ørsted, SUNSAT Arabsat 3A, Skynet 4E Globus No.15
March	Wide Field Infrared Explorer Globalstar 23, Globalstar 37, Globalstar 41, Globalstar 46 AsiaSat 3S DemoSat
April	Progress M-41, Sputnik 99 INSAT-2E USA-142 Eutelsat W3 Globalstar 19, Globalstar 42, Globalstar 44, Globalstar 45 Landsat 7 UoSAT-12 Ikonos-1 ABRIXAS, Megsat-0 USA-143
May	Orion 3 Feng Yun 1C, Shijian 5 TERRIERS, MUBLCOM Nimiq 1 USA-144 Oceansat-1, Kitsat-3, DLR-Tubsat STS-96 (Starshine 1)
June	Globalstar 25, Globalstar 47, Globalstar 49, Globalstar 52 Iridium 14A, Iridium 21A Astra 1H QuikSCAT FUSE
July	Gran' No.45 Molniya 3-50 Globalstar 30, Globalstar 32, Globalstar 35, Globalstar 51 Progress M-42 Okean-O No.1 STS-93 (Chandra) Globalstar 26, Globalstar 28, Globalstar 43, Globalstar 48
August	Telkom 1, Globalstar 24, Globalstar 27, Globalstar 53, Globalstar 54 Kosmos 2365 Kosmos 2366
September	Koreasat 3 Yamal-101, Yamal-102 Foton 12 Globalstar 33, Globalstar 50, Globalstar 55, Globalstar 58 EchoStar V Ikonos 2 Telstar 7 LMI-1 Resurs F-1M
October	USA-145 DirecTV-1R CBERS-1, SACI-1 Globalstar 31, Globalstar 56, Globalstar 57, Globalstar 59 Orion 2 Ekspress A1
November	GE-4 MTSAT-1 Shenzhou 1 Globalstar 29, Globalstar 34, Globalstar 39, Globalstar 61 USA-146
December	Hélios 1B, Clémentine Orbcomm FM30, Orbcomm FM31, Orbcomm FM32, Orbcomm FM33, Orbcomm FM34, Orbcomm FM35, Orbcomm FM36 XMM-Newton † VLS-1 V02 (SACI-2) USA-147 Terra STS-103 Arirang-1, ACRIMSAT, Millennial Galaxy 11 Kosmos 2367 Kosmos 2368
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). CubeSats are smaller. Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).