Indian Mini Satellite (IMS) is a family of modular [1] mini satellite buses developed by the Indian Space Research Organisation (ISRO). [2] [3]
Feature | IMS-1 [4] [5] [6][ predatory publisher] [7] | IMS-2 [6] [8] | IMS-3 (Planned IMS-2 Derivative) [9] |
Launch Mass | 100 kilograms (220 lb) | 450 kilograms (990 lb) | 450 kilograms (990 lb) |
Maximum bus mass | 70 kilograms (150 lb) | 250 kilograms (550 lb) | 250 kilograms (550 lb) |
Payload mass | 30 kilograms (66 lb) | 200 kilograms (440 lb) | 200 kilograms (440 lb) |
Propellant | 3.5 kilograms (7.7 lb) | 21 kilograms (46 lb) | |
Design lifetime | 2 years | 5 years | |
Raw bus voltage | 28-33 Volts | 28-33 Volts | 28-42 Volts |
Solar Array Power | 330 Watts (EOL) | 675 Watts (EOL) 850 Watts (BOL) |
850 Watts (BOL) |
Payload power | 30 Watts (Continuous) 70 Watts (Duty Cycle) |
250 Watts (Continuous) 600 Watts (Duty Cycle) |
250 Watts (Continuous) 400 Watts (Duty Cycle) |
Attitude Control | 3-axis stabilized Four Reaction Wheels Single 1N thruster |
3-axis stabilized Four Reaction Wheels Mono-propellant RCS Four 1N thrusters Four 0.2N thrusters |
|
Pointing Accuracy | ±0.1° (3σ) (all axes) | ± 0.1° (all axes) | ± 0.1° (all axes) |
SSR Storage | 32 Gb | 32 Gb (SDRAM) 256 Gb (Flash Memory) |
32 Gb (SDRAM) 256 Gb (Flash Memory) |
Payload data storage | ≤ 16 Gb | ≤ 32 Gb | |
Downlink | ≤ 8 Mbit/s DL rate | ≤ 105 Mbit/s DL rate | ≤ 160 Mbit/s DL rate |
Missions | |||
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