INSAT Satellite bus

The INSAT Satellite Bus is a series of satellite buses that have been manufactured by the Indian Space Research Organisation and marketed by NewSpace India Limited. It consist of five different versions; I-1K, I-2K, I-3K, I-4K& I-6K.^[1]

I-1K

I-1K (also referred to as INSAT-1000) is a satellite bus developed by the Indian Space Research Organisation (ISRO) and marketed by Antrix Corporation.^[2] The I-1K bus is designed to be compatible with lightweight geostationary satellites and is commonly used for meteorological satellites.The IRS or Indian Remote Sensing Satellite bus are also built on I-1K.^[1]

Design

• The I-1K bus can be used for satellites in the lightweight category, with a launch mass between 1,050 and 1,100 kilograms (2,310 and 2,430 lb).
• Its dimensions are 1.505 m × 1.476 m × 1.530 m (4.94 ft × 4.84 ft × 5.02 ft).
• I-1K's dry mass is 500 kg (1,100 lb) and can support payloads of 100 kg (220 lb).
• Its power systems can supply between 500 and 1000 watts.^[3]
• The average transponder life is 7 years which can be extended up to 12 years.

List of satellites launched using I-1K platform

• Kalpana-1
• GSAT-12^[4]
• IRNSS series (1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 1I)
• Chandrayaan-1
• Mars Orbiter Mission^[5]
• Aditya-L1 Mission

I-2K

I-2K is a satellite bus developed by Indian Space Research Organisation (ISRO), and marketed by Antrix Corporation.^[6] It is a standard bus for 2,000 kg class satellites; the 'I' in I-2K stands for INSAT, a group of communication satellites developed and launched by ISRO. The satellite buses developed by ISRO are specifically developed for small and medium weight satellites. I-2K spacecraft bus can supply DC power up to 3000 watts.^[7] I-2K platform is targeted towards satellites in liftoff mass in range of 1500–2500 kg.^[8]

Features of I-2K

• Launch Mass: 2,000–2,300 kg (4,400–5,100 lb).
• Dimensions: 1.65 * 1.53m in plan & 3.0m in height.
• Dry Mass: 600–950 kg (1,320–2,090 lb).
• Payload Mass: 160–200 kg (350–440 lb).
• Total Power: 2800 W.
• Payload Power: 2400 W.
• Transponder: 12 - 18.
• Mission Life: 12 - 15 Years.^[9]

List of satellites launched using I-2K platform

• INSAT series (3B | 3C | 3D | 3DR | 3E | 4C | 4CR)
• IRS series (1C | 1D | P3)
• GSAT series (1 | 2 | 3 (EDUSAT) | 4 | 5P | 6 | 6A | 7 | 7A | 9^[10] | 14^[11] | 31^[12])
• HYLAS-1

I-3K

I-3K or the INSAT 3000 is a satellite bus developed by Indian Space Research Organisation (ISRO), and marketed by Antrix Corporation and New Space India Ltd.^[13][14] It is the standard bus for 3,000-kg class satellites; the 'I' in I-3K stands for INSAT, a group of communication satellites developed and launched by ISRO. The I-3K bus can supply DC power up to 6500 watts, and is suitable for satellites with lift-off mass in range of 3,000-3,400 kg.^[15][16][17]

List of satellites launched using I-3K bus

• Eutelsat W2M (Now Afghansat 1)^[18][19]
• INSAT series (4A | 4B)
• GSAT series (8 | 10^[20] | 16 | 15 | 18 | 19 | 17 | 24 | 29 | 30)
• Chandrayaan-3 (Propulsion module)^[21]
• NISAR

I-4K

I-4K is a satellite bus being developed by the Indian Space Research Organisation (ISRO).^[22][23] It will be a standard bus for 4,000–6,500 kg (8,800–14,300 lb) class communication satellites.^[24] The I in I-4K stands for INSAT, a group of communication satellites developed and launched by ISRO. The I-4K spacecraft bus can supply DC power of 10 to 15 kilowatts.^[22][25]

List of satellites being developed with I-4K bus

• GSAT series

I-6K

I-6K is a Satellite bus developed by Indian Space Research Organisation (ISRO) ^[26] It will be a standard bus for 4,000–6,500 kg (8,800–14,300 lb) class communication satellites;^[27] the I in I-6K stands for INSAT and 6 signifies that it can support satellites up to 6,000 kg in weight. The I-6K spacecraft bus can supply DC power of 10 to 15 kilowatts.

See also

• Spaceflight portal

• Comparison of satellite buses
• Indian Mini Satellite Bus