Communications satellite
Intelsat 15
Names
| IS-15 / JSCAT-85
|
---|
|
Mission type
| Communications
|
---|
Operator
| Intelsat
/
SKY Perfect JSAT Group
|
---|
COSPAR ID
| 2009-067A
|
---|
SATCAT
no.
| 36106
|
---|
Website
| Intelsat
JSAT
|
---|
Mission duration
| 15 years
|
---|
|
|
|
Spacecraft
| IS-15
|
---|
Bus
| Star-2.4
|
---|
Manufacturer
| Orbital Sciences
|
---|
Launch mass
| 2,484 kg (5,476 lb)
|
---|
Dry mass
| 1,227 kg (2,705 lb)
|
---|
Power
| 4.6 kW
|
---|
|
|
|
Launch date
| 21:00, November 30, 2009 (UTC)
(
2009-11-30T21:00Z
)
|
---|
Rocket
| Zenit-3SLB
|
---|
Launch site
| Baikonur
45/1
|
---|
Contractor
| Land Launch
|
---|
|
|
|
Reference system
| Geocentric
|
---|
Regime
| Geostationary
|
---|
Longitude
| 85° east
|
---|
Semi-major axis
| 42,164.0 km (26,199.5 mi)
|
---|
Perigee altitude
| 35,786.0 km (22,236.4 mi)
|
---|
Apogee altitude
| 35,800.9 km (22,245.6 mi)
|
---|
Inclination
| 0°
|
---|
Period
| 1,436.1 minutes
|
---|
Epoch
| May 07, 2018
[1]
|
---|
|
|
|
Band
| 22 (+8 spares)
K
u
band
|
---|
Coverage area
| Russia
,
Near East
,
Indian Ocean
|
---|
|
|
Intelsat 15
, also known as
IS-15
, is a
communications satellite
owned by
Intelsat
. Intelsat 15 was built by
Orbital Sciences Corporation
, on a
Star-2.4
.
[2]
It is located at 85° E longitude on the
geostationary orbit
. It was launched from
Baikonur Cosmodrome
to a
geosynchronous transfer orbit
on 30 November 2009 by a
Zenit-3SLB
launch vehicle.
[3]
[4]
It has 22 active
K
u
band
transponders
, plus eight spares. Five of those transponders are owned and operated by
SKY Perfect JSAT Group
under the name
JCSAT-85
.
[5]
[2]
Satellite description
[
edit
]
Intelsat 15
is a
3 axis stabilized
geostationary
communications satellite
based on the
Star-2.4
satellite bus
. It weighed 2,484 kg (5,476 lb) at launch, had a dry mass of 1,227 kg (2,705 lb), and a design life 15 years.
[6]
[7]
It had a power availability dedicated to the payload of 4.6 kW, due to its
multi-junction
GaAs
solar cells
. It also had two 4840
watt hour
Li-ion batteries
for surviving the solar eclipses.
[6]
The satellite used a
bipropellant
propulsion system with an
IHI BT-4
Liquid Apogee Engine
for
orbit circularization
and thrusters and
reaction wheels
for
station keeping
and
attitude control
.
[6]
[2]
It was filled with enough propellant for 15 years, but due to the efficient launch and transfer 17 are expected.
[2]
Its payload is composed two 2.3 m (7 ft 7 in) deployable dual grid reflectors, plus one 1.4 m (4 ft 7 in) deck mounted reflector. They are fed by 22 active
K
u
band
transponders
, plus eight spares. Intelsat uses 17 transponders, which have a bandwidth of twenty 36 MHz
transponder equivalents
.
[6]
[2]
Its footprint is arranged in a Russia beam and a Middle East beam.
[8]
SKY Perfect JSAT Group
owns five physical transponders under the name
JCSAT-85
, four have a bandwidth of 36 MHz and the other one has 72 MHz. JSCAT-85 footprint is arranged in two beams, West IOR Beam, covering middle East and the Arabic Sea, and East IOR Beam, covering the Eastern Asia coast and Pacific Ocean.
[5]
[9]
History
[
edit
]
On April 2, 2007,
JSAT Corporation
(now
SKY Perfect JSAT Group
) announced an agreement to purchase a payload consisting of five transponders on the yet to be built
Intelsat 15
. Intelsat and JSAT had already collaborated on the
Horizons-1
and
Horizons-2
satellites. The satellite, also known as
IS-15
, would provide services to the Asia-Pacific, Indian Ocean and Middle East regions from the 85°E longitude on the
geostationary orbit
, where it would replace
Intelsat 709
. It would have 22 K
u
band transponders in total and a design life of 15 years.
[10]
The JSAT payload would be known as JCSAT-85.
[9]
On May 1, 2007,
Orbital Sciences Corporation
(now
Orbital ATK
) announced that it had been awarded a contract to manufacture Intelsat 15. It would be based on the
STAR-2
satellite bus
, generate 4.6 kW of power for its 22-transponder K
u
band payload and had an expected launch date of early 2009.
[11]
On February 26, 2008,
Sea Launch
announce a contract with Intelsat to launch two satellites manufactured by Orbital Corporation, Intelsat 15 and
Intelsat 16
. The contract was itself a renegotiation for repurpose two already existing reservation by Intelsat with Sea Launch for two satellites to these new spacecraft. They were expected to be launched by the
Land Launch
service, which used
Zenit-3SLB
rockets from the
Baikonur Cosmodrome
in Kazakhstan, during 2009.
[12]
Between October 27 and November 5, 2009 Intelsat 15 was processed in the Baikonur Cosmodrome. On November 6, it was filled with propellant.
[13]
On November 24, 2009, JSAT announced that the launch of Intelsat 15 was expected on November 29 at 1:00 UTC.
[14]
But during the launch attempt on November 29, the automatic prelaunch issued an abort command.
[15]
[13]
But the launch committee agreed to make a second attempt on the next day.
[13]
On November 30, 2009, at 21:00 UTC, the Zenit-3SLB successfully launched Intelsat 15, from
Baikonur Cosmodrome Site 45
. After a six and a half hour mission, the
DM-3SLB
successfully separated the spacecraft and at 03:28 UTC, first signals from spacecraft were received.
[16]
[17]
The launch put the satellite with margins of its planned
geosynchronous transfer orbit
with a
perigee
of 10,286 km, an
apogee
of 35,790 km and a 12° inclination to the Equator.
[13]
References
[
edit
]
- ^
n2yo.com.
"Intelsat 15"
. Retrieved
May 7,
2018
.
{{
cite web
}}
: CS1 maint: numeric names: authors list (
link
)
- ^
a
b
c
d
e
Krebs, Gunter Dirk (2016-04-21).
"Intelsat 15 (JCSat 85)"
.
Gunter's Space Page
. Retrieved
2016-09-16
.
- ^
"Intelsat 15"
. NASA Space Science Data Coordinated Archive. August 23, 2016
. Retrieved
2016-09-16
.
- ^
"Intelsat 15"
. NASA Space Science Data Coordinated Archive/Orbital Information. August 23, 2016
. Retrieved
2016-09-16
.
- ^
a
b
"Who we are"
.
SKY Perfect JSAT Group
. 2012-08-03. Archived from
the original
(PDF)
on 2016-09-08
. Retrieved
2016-09-16
.
- ^
a
b
c
d
"Intelsat 15 Fact Sheet"
(PDF)
.
Orbital ATK
. 2015
. Retrieved
2016-09-16
.
- ^
"Intelsat 15"
.
satbeams.com
. Retrieved
2016-09-16
.
- ^
"Intelsat 15 at 85° E"
.
Intelsat
. Retrieved
2016-09-16
.
- ^
a
b
"JCSAT-85"
.
SKY Perfect JSAT Group
. Archived from
the original
on 2016-11-17
. Retrieved
2016-09-16
.
- ^
"JSAT Reaches Agreement to Own Transponders on Intelsat 15 Satellite"
.
JSAT Corporation
. April 2, 2007. Archived from
the original
on 2007-12-25
. Retrieved
2016-09-19
.
- ^
"Orbital Awarded New Contract For IS-15 Commercial Communications Satellite By Intelsat"
.
Orbital Sciences Corporation
. May 1, 2007. Archived from
the original
on 2007-07-08
. Retrieved
2016-09-19
.
- ^
"Sea Launch signs with Intelsat for two Land Launch Missions"
.
Sea Launch
. February 26, 2008. Archived from
the original
on 2016-09-19
. Retrieved
2016-09-19
.
- ^
a
b
c
d
"Land Launch Project ? Chronology of Launches ? INTELSAT 15 Launch"
.
RSC Energia
. Archived from
the original
on 2016-03-26
. Retrieved
2016-09-19
.
- ^
"Notice Regarding Launch Schedule for the Intelsat 15 Satellite"
(PDF)
.
SKY Perfect JSAT Group
. November 24, 2009. Archived from
the original
(PDF)
on 2016-09-19
. Retrieved
2016-09-19
.
- ^
"Notice Regarding Postponed Launch of the Intelsat 15 Satellite"
(PDF)
.
SKY Perfect JSAT Group
. November 30, 2009. Archived from
the original
(PDF)
on 2016-09-19
. Retrieved
2016-09-19
.
- ^
"Land Launch Successfully Deploys Intelsat 15 Satellite to Orbit"
.
Sea Launch
. November 30, 2009. Archived from
the original
on 2016-09-19
. Retrieved
2016-09-19
.
- ^
"Notice Regarding Successful Launch of the Intelsat 15 Satellite"
(PDF)
.
SKY Perfect JSAT Group
. December 1, 2009. Archived from
the original
(PDF)
on 2016-09-19
. Retrieved
2016-09-19
.
|
---|
Launch designations
| |
---|
Operational designations
| |
---|
|
---|
January
| |
---|
February
| |
---|
March
| |
---|
April
| |
---|
May
| |
---|
June
| |
---|
July
|
- TerreStar-1
- Kosmos 2451
,
Kosmos 2452
,
Kosmos 2453
- RazakSAT
- STS-127
(
JEM-EF
,
AggieSat 2
,
BEVO-1
,
Castor
,
Pollux
)
- Kosmos 2454
,
Sterkh No.11L
- Progress M-67
- DubaiSat-1
,
Deimos-1
,
UK-DMC 2
,
Nanosat-1B
,
AprizeSat-3
,
AprizeSat-4
|
---|
August
| |
---|
September
|
- USA-207 / PAN
- HTV-1
- Meteor-M No.1
,
BLITS
,
Sterkh-2
,
SumbandilaSat
,
UGATUSAT
,
Universitetsky-Tatyana-2
- Nimiq 5
- Oceansat-2
,
Rubin 9.1
,
Rubin 9.2
,
BeeSat-1
,
UWE-2
,
ITU-pSat1
,
SwissCube-1
- USA-208
/
STSS-Demo 1
,
USA-209
/
STSS-Demo 2
- Soyuz TMA-16
|
---|
October
| |
---|
November
| |
---|
December
| |
---|
Launches are separated by dots ( ? ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ).
Crewed flights
are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
|