Intelsat 35e

Intelsat 35e
	Intelsat 35e launch
Names	IS-35e
Mission type	Communication
Operator	Intelsat
COSPAR ID	2017-041A
SATCAT no.	42818
Website	Intelsat IS-35e
Spacecraft properties
Spacecraft	IS-35e
Bus	Boeing 702MP
Manufacturer	Boeing
Launch mass	6,761 kg (14,905 lb)
Power	12 kW
Start of mission
Launch date	July 5, 2017, 23:38 UTC[1]
Rocket	Falcon 9 Full Thrust[2]
Launch site	Kennedy LC-39A
Contractor	SpaceX
Orbital parameters
Reference system	Geocentric
Regime	Geosynchronous
Longitude	34.5°W (intended)
Semi-major axis	42,165 km (26,200 mi)
Perigee altitude	35,785.1 km (22,235.8 mi)
Apogee altitude	35,803.3 km (22,247.1 mi)
Inclination	0°
Period	1,436.1 minutes
Transponders
Band	C band: high-throughput spot beams, plus wide beams; Ku band: 39 (equiv.)
Bandwidth	C band: 4,356 MHz; Ku band: 1,404 MHz
	EpicNG

Intelsat 35e, also known as IS-35e is an Intelsat high-throughput geostationary communications satellite designed and manufactured by Boeing on the Boeing-702MP platform.[3][4] It was launched on 5 July 2017.[1]

It is the fourth satellite of the Epic^NG service and covers the Americas, Europe and Sub-Sahara Africa from the 34.5° west longitude.[5] It has a mixed C band and K_u band, with the C band featuring Epic^NG spot beams.[3][4][6]

Satellite description

Intelsat 35e was designed and manufactured by Boeing on the Boeing 702MP satellite bus. It had a launch mass of 6,761 kg (14,905 lb)[7] and has a design life of more than 15 years.[3][4]

It is powered by two wings, with four panels each, of triple-junction GaAs solar cells.[8][3] The 702MP platform was designed to generate between 6 and 12 kW.[8]

Its payload was the fourth high-throughput Epic^NG deployment. The Epic^NG is characterized by the implementation of frequency reuse due to a mix of frequency and polarization in small-spot beams. Not only applied to the classical HTS K_a band, but also applying the same technique in K_u band and C band. The Epic^NG series also keep the use of wide beams to offer high throughput and broadcast capabilities in the same satellite.[5]

In the case of Intelsat 35e, the C-band side has Epic^NG spot beams with a total downlink bandwidth of 4,356 MHz. The spot beams offer high bandwidth for Europe, Sub-Sahara Africa, and the Americas. The K_u band has 39 transponder equivalents for a total downlink bandwidth of 1,404 MHz. Of the K_u three wide beams, one is covering the Caribbean, another Europe and the Mediterranean, and the third beams cover Europe and Northern Africa.[6]

History

Launch of Intelsat 35e in Cape Canaveral.

In July 2009, Intelsat became the first customer of the Boeing 702MP platform, when it placed an order for four spacecraft to be built, Intelsat 21, Intelsat 22, Intelsat 27 and the first Epic^NG satellite, Intelsat 29e. In May 2013, Intelsat contracted for an additional four Epic^NG satellites, the first of which would be Intelsat 33e.[8] On July 8, 2014, Boeing announced a ninth 702MP order, and sixth EpicNG, for the Intelsat 35e.[9]

During 2014, Intelsat announced to service contract where the clients would start using Intelsat 903 at the 34.5° west position and then seamlessly transfer their services to Intelsat 35e as soon as it was commissioned into service.[10][11]

Launch history

Following two aborted launch attempts earlier in July, Intelsat 35e was launched on 5 July 2017 from the SpaceX-leased launch pad 39A in Florida. No attempt to recover the first-stage booster was made on this launch, as the first stage was flown in expendable mode in order to maximize the orbital energy imparted to this high-mass commsat.[1]

For planning purposes, the launch had been planned for as early as 1Q2017. During an interview with Intelsat's CEO Stephen Spengler in February 2016, it was disclosed that Intelsat 35e was expected to launch in 2017.[12] In August 2016, it emerged that the launch was assigned to a Falcon 9 Full Thrust mission scheduled for the first quarter of 2017.[2] Performance improvements of the Falcon 9 vehicle family enable the launch of this 6-tonne satellite without upgrading to a Falcon Heavy variant.

Intelsat 35e was initially prepared for launch on 2 July 2017 from launch pad 39A, with a 59-minute-duration launch window. The first launch attempt was aborted at T-9 seconds in the countdown for a GNC-criteria violation. With insufficient time to recycle, the launch was scrubbed and next attempt was scheduled with a 24-hour delay.[7]

This second launch attempt was made on 3 July, and it too was aborted by the onboard computers at the same T minus 9 seconds in the countdown. Having already been pushed to the end of the launch window with no time to recycle, this resulted in a scrub for the second consecutive day.[7]

Intelsat 35e could have been rescheduled for a 4 July 2017 launch. However, in the event, the 4 July launch was postponed—per SpaceX, "out of an abundance of caution"—prior to loading propellants. A complete check of the systems both on the rocket and on the pad was performed.[7]

Intelsat 35e was successfully launched and placed in orbit on 5 July 2017.[1]

References

http://spacenews.com/spacex-crests-double-digit-marker-notches-tenth-launch-in-a-single-year-for-first-time/
Clark, Stephen (30 August 2016). "SES agrees to launch satellite on 'flight-proven' Falcon 9 rocket". Spaceflight Now. Intelsat, one of the world’s largest geostationary satellite operators alongside SES, has one launch reserved on a newly-built Falcon 9 rocket in the first quarter of 2017, when the Intelsat 35e satellite will launch from Cape Canaveral.
Krebs, Gunter Dirk (2016-04-21). "Intelsat 35e". Gunter's Space Page. Retrieved 2016-08-25.
"Intelsat 35e". Satbeams. Retrieved 2016-08-25.
"White Paper — The Intelsat Epic^NG Platform" (PDF). Intelsat. Retrieved 2016-08-25.
"Intelsat 35e at 325.5° E". Intelsat. Retrieved 2016-08-25.
Graham, William (July 3, 2017). "SpaceX Falcon 9 launches with Intelsat 35e at the third attempt". NASASpaceflight.
"Intelsat" (PDF). Boeing. October 2015. Retrieved 2016-08-24.
"Boeing to Build Intelsat 35e EpicNG Satellite". July 8, 2014. Retrieved 2016-08-24.
"CANAL+ OVERSEAS Expands Capacity with Intelsat to Enable High Definition DTH Programming in the Caribbean". Intelsat. April 3, 2014. Retrieved 2016-08-25.
"Orange Niger Expands Relationship with Intelsat, Extending the Reach of its Cellular Network in Rural Niger". Intelsat. August 6, 2014. Retrieved 2016-08-25.
"Intelsat's Epic Wager" (PDF). Space News. February 29, 2016. Retrieved 2016-08-25.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[sn20170705-1] ttp://spacenews.com/spacex-crests-double-digit-marker-notches-tenth-launch-in-a-single-year-for-first-time/

[sfn-20160830-2] Clark, Stephen (30 August 2016). "SES agrees to launch satellite on 'flight-proven' Falcon 9 rocket". Spaceflight Now. Intelsat, one of the world’s largest geostationary satellite operators alongside SES, has one launch reserved on a newly-built Falcon 9 rocket in the first quarter of 2017, when the Intelsat 35e satellite will launch from Cape Canaveral.

[gsp-intelsat35e-3] Krebs, Gunter Dirk (2016-04-21). "Intelsat 35e". Gunter's Space Page. Retrieved 2016-08-25.

[satbeams-intelsat35e-4] "Intelsat 35e". Satbeams. Retrieved 2016-08-25.

[intelsat-wpepicngplatform-5] "White Paper — The Intelsat Epic^NG Platform" (PDF). Intelsat. Retrieved 2016-08-25.

[intelsat-intelsat35e-6] "Intelsat 35e at 325.5° E". Intelsat. Retrieved 2016-08-25.

[nsf20170703-7] Graham, William (July 3, 2017). "SpaceX Falcon 9 launches with Intelsat 35e at the third attempt". NASASpaceflight.

[boeing-backgrounderintelsat-8] "Intelsat" (PDF). Boeing. October 2015. Retrieved 2016-08-24.

[boeing-pr20140708-9] "Boeing to Build Intelsat 35e EpicNG Satellite". July 8, 2014. Retrieved 2016-08-24.

[intelsat-pr20140403-10] "CANAL+ OVERSEAS Expands Capacity with Intelsat to Enable High Definition DTH Programming in the Caribbean". Intelsat. April 3, 2014. Retrieved 2016-08-25.

[intelsat-pr20140806-11] "Orange Niger Expands Relationship with Intelsat, Extending the Reach of its Cellular Network in Rural Niger". Intelsat. August 6, 2014. Retrieved 2016-08-25.

[spacenews-20160229-12] "Intelsat's Epic Wager" (PDF). Space News. February 29, 2016. Retrieved 2016-08-25.

Intelsat Corporation
COMSAT Intelsat Americas PanAmSat ITSO STS-49 List of Intelsat satellites
Intelsat I, II, III	Intelsat I Intelsat II F-1 II F-2 II F-3 II F-4 Intelsat III F-1 III F-2 III F-3 III F-4 III F-5 III F-6 III F-7 III F-8
Intelsat IV	Intelsat IV F-1 IV F-2 IV F-3 IV F-4 IV F-5 IV F-6 IV F-7 IV F-8 IVA F-1 IVA F-2 IVA F-3 IVA F-4 IVA F-5 IVA F-6
Intelsat V	Intelsat V F-1 V F-2 V F-3 V F-4 V F-5 V F-6 V F-7 V F-8 V F-9† VA F-10 VA F-11 VA F-12 VA F-13 VA F-14 VA F-15
Intelsat VI	Intelsat 601 602 603 604 605
Intelsat 7-10	Intelsat 701 702 703 704 705 706 707 708 709 801 802 803 804 805 806 901 902 903 904 905 906 907 10-02
ex-PanAmSat	Intelsat 1R 2 3R 4 5 6B 7 8 9 10 11 12
Recent Intelsat	Intelsat 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 (New Dawn) 29e 30 31 32e 33e 34 35e 36 37e 38 39
Galaxy (Intelsat Americas)	Galaxy 3C 4R 5 9 10R 11 12 13 14 15 16 17 18 19 23 25 26 27 28
Other	APR-1 APR-2 Horizons-1 Horizons-2 Horizons-3e Intelsat K Marisat-F2 SBS 6

← 2016 · Orbital launches in 2017 · 2018 →
January	TJS-2 – Lingqiao / Jilin-1 03 · Caton-1 · Xingyun Shiyan 1 – Iridium NEXT 1–10 – TRICOM-1 – USA-273 / SBIRS GEO-3 – DSN-2 – Hispasat AG1
February	Intelsat 32e / SkyBrasil-1 · Telkom-3S – Cartosat-2D · INS-1A, 1B · Flock-3p × 88 · Lemur-2 × 8 · Al Farabi-1 · BGUSAT · DIDO-2 · Nayif 1 · PEASS – Dragon CRS-10 – Progress MS-05
March	USA-274 / NROL-79 / Intruder 8 – Tiankun-1 – Sentinel-2B – EchoStar 23 – IGS-Radar 5 – USA-275 / WGS-9 – SES-10
April	Shijian 13 – Cygnus CRS OA-7 – Soyuz MS-04 – Tianzhou 1 · SilkRoad-1
May	USA-276 / NROL-76 – Koreasat 7 · SGDC-1 – GSAT 9 / South Asia Satellite – Inmarsat-5 F4 – SES-15 – "It's a Test" – EKS-2
June	QZS-2 – ViaSat-2 · Eutelsat 172B – Dragon CRS-11 · NICER · Birds-1 (TOKI · GhanaSat-1 · Mazaalai · BRAC Onnesha · Nigeria EduSat-1) – GSAT-19 – EchoStar 21 – Progress MS-06 – HXMT / Insight · Zhuhai-1 01, 02 · ÑuSat 3 – ChinaSat 9A – Cartosat-2E · Aalto-1 · ROBUSTA-1B · Max Valier Sat – Nivelir-ZU (14F150) – BulgariaSat-1 – Iridium NEXT-2 – EuropaSat/Hellas Sat 3 · GSAT-17
July	Shijian-18 – Intelsat 35e – Kanopus-V-IK · CICERO × 3 · Corvus-BC × 2 · Ecuador-UTE-YuZGU · Flock-2k × 48 · Flying Laptop · Iskra-MAI-85 · Lemur-2 × 8 · MKA-N × 2 · Mayak · NORSAT-1, -2 · NanoACE · TechnoSat · WNISAT-1R – Soyuz MS-05
August	OPTSAT-3000 · VENµS – Dragon CRS-12 · ASTERIA – Blagovest 11L – TDRS-M – Michibiki 3 – Formosat-5 – ORS-5 – IRNSS-1H
September	USA-277 / OTV-5 – Amazonas 5 – Soyuz MS-06 – Kosmos 2522 / GLONASS-M 752 – USA-278 / NROL-42 – AsiaSat 9 – Yaogan-30-01 × 3 – Intelsat 37e · BSAT-4a
October	VRSS-2 – Iridium NEXT 21–30 – QZS-4 – SES-11 / EchoStar 105 – Sentinel-5 Precursor – Progress MS-07 – USA-279 / NROL-52 / Quasar 21 – Koreasat 5A – SkySat × 6 · Flock-3m × 4
November	BeiDou-3 M1 · M2 – Mohammed VI-A – Cygnus CRS OA-8E · Asgardia-1 – Fengyun-3D · HEAD-1 – NOAA-20 – Jilin-1 × 3 – Yaogan-30-02 × 3 – Meteor-M No.2-1
December	Kosmos 2524 – LKW-1 – Alcomsat-1 – Galileo FOC 15-18 – Dragon CRS-13 – Soyuz MS-07 – GCOM-C · SLATS – Iridium NEXT 31–40 – Yaogan-30-03 × 3 – AngoSat 1
Launches are separated by dashes ( – ), payloads by dots ( · ), multiple names for the same satellite by slashes ( / ). CubeSats are smaller. Crewed flights are bolded. Launch failures are in italics. Payloads deployed from other spacecraft are (enclosed in brackets).