NSS-806

Communications satellite

0°00′N 47°30′W / 0°N 47.5°W / 0; -47.5

NSS-806
Spacecraft properties

Mission type	Communications
Operator	Intelsat → SES World Skies
COSPAR ID	1998-014A
SATCAT no.	25239
Mission duration	15 years


Spacecraft type	AS-7000
Manufacturer	Lockheed Martin
Launch mass	3,720 kg (8,200 lb)^[1]
Dry mass	2,200 kg (4,900 lb)^[1]


Start of mission
Launch date	February 28, 1998, 00:21 (1998-02-28UTC00:21Z) UTC^[2]
Rocket	Atlas IIAS AC-151
Launch site	Cape Canaveral SLC-36B


Orbital parameters
Reference system	Geocentric
Regime	Geostationary
Eccentricity	0.0004615
Perigee altitude	35,806.0 kilometres (22,248.8 mi)
Apogee altitude	35,767.0 kilometres (22,224.6 mi)^[3]
Inclination	0.058°
Period	1,436.1 minutes
Epoch	May 7, 2017^[4]


Transponders
Band	28 C Band, 3 K_u band
Coverage area	Americas, Europe

Intelsat 8 ← Intelsat 805 Intelsat 901 (Intelsat 9) →

NSS-806 (New Skies Satellite 806), before Intelsat 806, is a communications satellite originally operated by Intelsat. Launched in 1998 it was operated in geostationary orbit at a longitude of 47 degrees west for around 15 years. It is currently located in the orbital position of 47.5 degrees west longitude, was initially operated by Intelsat, orbited at 40.5 degrees west, and was purchased by SES World Skies (a subsidiary of SES).

Satellite

NSS-806 is equipped with 28 transponders in C band and 3 in Ku band, making transmissions for the Americas and parts of Europe. In order to receive the signal it requires a monofocal antenna (LNBF antenna in the center), a LNBF for C band (5150 MHz) and a digital receiver compatible with C band. The NSS-806 emits its signal in circular polarization.

Launch

The launch of NSS-806 made use of an Atlas II rocket flying from Cape Canaveral Air Force Station, Florida, United States. The launch took place at 00:16 UTC on February 28, 1998, with the spacecraft entering a geosynchronous transfer orbit. NSS-806 subsequently fired its apogee motor to achieve geostationary orbit.

Health and replacement

In July 2017, seven years past its 12-year intended design life, NSS-806 lost the use of 12 of its 39 transponders. NSS-806's replacement, SES-14, was scheduled to be launched in first quarter of 2018 on a SpaceX Falcon 9, and SES predicted that the transponder failure would result in a revenue loss of between 7 and 9 million euros.^[5] The following month, SES arranged to swap flights so that SES-12 would launch in January 2018 on an Ariane 5, with SES-12, originally scheduled for that flight, now launching on the Falcon 9 later in Q1.^[6]

SES-14 was launched from Kourou on 25 January 2018, but was placed in an incorrect orbit due to a launch vehicle anomaly. SES reported that the all-electric SES-14 would take four more weeks than originally planned to reach its operating orbit, but that the satellite was healthy and was expected to meet its designed life time. SES-14's in-service date, originally set for July 2018, was expected to be pushed back until at least August 2018.^[7]^[8]

Technical details

C-Band slot chart
Slot	Uplink (GHz)	Downlink (GHz)	Hemi A	Hemi B	Bandwidth (MHz)
5'-6'	6.527	3.502	12'	22'	72
3'-4'	6.607	3.582	11'	21'	72
1'-2'	5.888	3.663	10	20	72
1-2	5.968	3.743	11	21	72
3	6.028	3.803	12A	22A	36
4	6.068	3.843	12B	22B	36
5	6.108	3.883	13A	23A	36
6	6.148	3.923	13B	23B	36
7	6.201	3.976	14A	24A	36
9	6.280	4.055	15	25	36
10	6.320	4.095	16	26	36
11	6.360	4.135	17	27	36
12	6.4025	4.1775	18	28	41

Ku-band slot chart
Slot	Uplink (GHz) Polariztion H	Downlink (GHz) Polarization V	Spot 1	Bandwidth (MHz)
1-2	14.0425	12.7475	261	77
3-4	14.125	11.830	262	72
5-6	14.205	11.910	263	72

References

^ ^a ^b "NSS-806". SatBeams - Satellite Details. Retrieved May 7, 2017.
^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved May 7, 2017.
^ Peat, Chris. "NSS 806 (INTELSAT 806)". Heavens Above. Retrieved May 7, 2017.
^ "INTELSAT 806". N2YO. Retrieved May 7, 2017.
^ Henry, Caleb (July 31, 2017). "SES loses 12 transponders on NSS-806 satellite, says impact is temporary". Space News. Retrieved January 27, 2018.
^ Henry, Caleb (August 28, 2017). "SES flips SpaceX, Arianespace launches to speed NSS-806 replacement". Space News. Retrieved January 27, 2018.
^ Henry, Caleb (January 26, 2018). "Satellites placed into incorrect orbits by Ariane 5 can be recovered, owners say". Space News. Retrieved January 27, 2018.
^ Payer, Markus (January 26, 2018). "SES-14 in good health and on track despite launch anomaly". SES. Retrieved January 27, 2018.

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v t e Satellites operated by SES
SES fleet	Active: SES-1 2 3 4 5 6 7 8 9 10 11 (EchoStar 105) 12 14 15 16 (GovSat-1) 17
AMC fleet	Active: AMC-4 6 8 10 11 15 16 18 21 Backups: AMC-7 Retired: AMC-1 2 3 5 9 Failed launch: AMC-14
NSS fleet	Active: NSS-6 7 9 10 11 12 806 Retired: NSS-5 513 703 K Failed launch: NSS-8
Astra fleet	Active: Astra 1KR 1L 1M 1N 2E 2F 2G 3B 4A 5B Backups: Astra 1D 1F 1G 1H 2A 2B 2C 2D 3A Retired: Astra 1A 1B 1C 1E 5A Sirius 3 Failed launch: Astra 1K Orbital positions: 5.0°E 19.2°E 23.5°E 28.2°E 31.5°E Subsidiary: SES Astra
Third parties	Active: Ciel-2 MonacoSAT QuetzSat 1 Yahsat 1A

v t e ← 1997 Orbital launches in 1998 1999 →
Lunar Prospector Skynet 4D Ofek-4 STS-89 Soyuz TM-27 USA-137 Brasilsat B3 Inmarsat-3 F5 Orbcomm FM3 Orbcomm FM4 GFO Ad Astra Globalstar 1 Globalstar 2 Globalstar 3 Globalstar 4 Kosmos 2349 Iridium 50 Iridium 52 Iridium 53 Iridium 54 Iridium 56 Kakehashi SNOE Teledesic 1 Hot Bird 4 Intelsat 806 Progress M-38 (VDU-2) USA-138 SPOT 4 Iridium 51 Iridium 61 Iridium 55 Iridium 57 Iridium 58 Iridium 59 Iridium 60 TRACE Iridium 62 Iridium 63 Iridium 64 Iridium 65 Iridium 66 Iridium 67 Iridium 68 STS-90 Globalstar 6 Globalstar 8 Globalstar 14 Globalstar 15 Nilesat 101 BSat-1B Kosmos 2350 Iridium 69 Iridium 71 Kosmos 2351 EchoStar IV USA-139 NOAA-15 Progress M-39 Iridium 70 Iridium 72 Iridium 73 Iridium 74 Iridium 75 Zhongwei 1 STS-91 Thor 3 Kosmos 2352 Kosmos 2353 Kosmos 2354 Kosmos 2355 Kosmos 2356 Kosmos 2357 Intelsat 805 Kosmos 2358 Kosmos 2359 Molniya 3-49 Nozomi Shtil-1 Tubsat-N Tubsat-N1 Resurs-O1 #4 Fasat-Bravo TMSAT Gurwin Techsat 1B WESTPAC SAFIR-2 Sinosat-1 Kosmos 2360 Orbcomm FM13 Orbcomm FM14 Orbcomm FM15 Orbcomm FM16 Orbcomm FM17 Orbcomm FM18 Orbcomm FM19 Orbcomm FM20 Mercury 3 Soyuz TM-28 Iridium 3 Iridium 76 ST-1 Galaxy 10 Astra 2A Kwangmyŏngsŏng-1 Iridium 79 Iridium 80 Iridium 81 Iridium 82 Globalstar 5 Globalstar 7 Globalstar 9 Globalstar 10 Globalstar 11 Globalstar 12 Globalstar 13 Globalstar 16 Globalstar 17 Globalstar 18 Globalstar 20 Globalstar 21 PAS-7 Orbcomm FM21 Orbcomm FM22 Orbcomm FM23 Orbcomm FM24 Orbcomm FM25 Orbcomm FM26 Orbcomm FM27 Orbcomm FM28 Molniya-1T #99 STEX (USA-141) Eutelsat W2 Sirius 3 Hot Bird 5 USA-140 Maqsat 3 Deep Space 1 SEDSAT-1 Progress M-40 (Sputnik 41) AfriStar GE-5 STS-95 (SPARTAN-201, PANSAT) PAS-8 Iridium 2 Iridium 83 Iridium 84 Iridium 85 Iridium 86 Zarya / ISS Bonum 1 STS-88 (Unity, PMA-1 PMA-2 SAC-A MightySat-1 Satmex 5 SWAS Nadezhda 5 Astrid 2 Mars Climate Orbiter Iridium 11 Iridium 20 PAS-6B Kosmos 2361 Kosmos 2362 Kosmos 2363 Kosmos 2364
Payloads are separated by bullets ( · ), launches by pipes ( \| ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

← 1997

Orbital launches in 1998

1999 →

Lunar Prospector
Skynet 4D
Ofek-4
STS-89
Soyuz TM-27
USA-137
Brasilsat B3
Inmarsat-3 F5
Orbcomm FM3
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GFO
Ad Astra
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Iridium 50
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Kakehashi
SNOE
Teledesic 1
Hot Bird 4
Intelsat 806
Progress M-38 (VDU-2)
USA-138
SPOT 4
Iridium 51
Iridium 61
Iridium 55
Iridium 57
Iridium 58
Iridium 59
Iridium 60
TRACE
Iridium 62
Iridium 63
Iridium 64
Iridium 65
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STS-90
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BSat-1B
Kosmos 2350
Iridium 69
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Kosmos 2351
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USA-139
NOAA-15
Progress M-39
Iridium 70
Iridium 72
Iridium 73
Iridium 74
Iridium 75
Zhongwei 1
STS-91
Thor 3
Kosmos 2352
Kosmos 2353
Kosmos 2354
Kosmos 2355
Kosmos 2356
Kosmos 2357
Intelsat 805
Kosmos 2358
Kosmos 2359
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Nozomi
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Kosmos 2361
Kosmos 2362
Kosmos 2363
Kosmos 2364

Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).