INSAT 4B

India


Spacecraft n:

Indian spacecraft n: 46

INSAT= Indian National Satellite

Launch data:

Designation 30793 / 07007A
Launch date 11 Mar 2007 - 22:03 UT
Launch site Ko, ELA-3
Launch vehicle  Ariane-5ECA (V175)
Mission Government: Communications
Geostationary orbit on Mar 27.00:
Perigee / Apogee 35781 x 35791 km
Eccentricity 6,05E-04
Inclination 0.09°
Period 1436.10 min



Insat-4B antenna

Insat-4B assembly


Spacecraft data:

Prime contractor  ISRO
Operator Indian Space Research Organization (ISRO)
Platform  
Mass at launch  3025 kg
Dry Mass 1335 kg
Basic shape  Box+ 2panels + 2dishes
Dimension (m) 2.0x1.77x3.10
15.4 span
Solar array  
Stabilization  It uses 3 earth sensors, 2 digital sun sensors, 8 coarse analog sun sensors, 3 solar panel sun sensors and one sensor processing electronics. The wheels and wheel drive electronics were imported with indigenous wheel interface module to interface the wheel drive electronics and AOCE.
Propulsion The propulsion system is employing 16 thrusters, 4 each located on east, west and AY sides and 2 each on north and south sides. There is one 440 N liquid apogee motor (using Mono Methyl Hydrazine (MMH) as fuel and oxides of Nitrogen ( MON3 as oxidizer) and three presurant tanks mounted on the LAM deck.
DC power  5859 W
Equipment 12 Ku band high power transponders covering Indian main land using 140W radiatively cooled TWTAs.
12 C band high power transponders with extended coverage, covering southeast and northwest region apart from Indian main land using 63 W TWTAs
Design lifetime  > million years - active: 12 yrs - still active

Location:

BeginEndPosition
   93.5 E
 July 2012  93.48 E

Tested at 90.5E, went operational in Apr 2007.


Insat-4B mission profile

C-band:


Main transponders 12
Backup transponders  
Power  
Bandwidth  
Coverage India, Middle East to South East Asia
G/T max  
Polarization  


Ku-band:


Main transponders 12
Backup transponders  
Power  
Bandwidth  
Coverage India
G/T max  
Polarization  

Mission details:


Ref.: #7(JR578), #120, #206, #207, #226 - update: 16.10.12