Satellite navigation equipment
SPUTNIX
A GNSS receiver unit (SX-SBOX-GNSS-01) providing precision position, velocity and time synchronization for the spacecraft.
Key figurescomparable across the catalogue
- Mass
- 0.7 kg
- Largest dimension
- 171 mm
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Dimensions
- 171 x 111 x 51 (without fasteners) mm
- Mass
- 0.7 kg
- Power voltage
- 22-34, galvanic isolation 500 V
- Power consumption, wt
- 2
- Duplicated interfaces
- CAN2B, SpaceWire
- Coordinate determination error
- 10 (sigma)
- Speed determination error, m/s
- 0.01
- Time error
- ±10-8 s during battery life of at least 48 hours
About
The device’s task is to adjust the output 1 Hz signal timing to the 1 Hz signal of the navigation receiver so that the averaged position of the 1 Hz GNSS signal coincides with the 1 Hz bearing signal, and to keep the 1 Hz bearing signal in its current position in the absence of the 1 Hz navigation receiver signal. The device uses a highly stable (high short-term stability) crystal oscillator with a typical frequency of 10 MHz as its own time/frequency source. The adjustment depending on control voltage change is ±3×10-7, approximately 3 Hz; this frequency change to extreme positions relative to the real 10 MHz creates a lead or lag of the divided 1 Hz signal relative to the divided real 10 MHz, of 300 ns over a 1 s period. The averaged position of the navigation receiver’s 1 Hz signal can be taken as real 1 Hz. It is SPUTNIX’s own development, ECSS-compatible, low cost, light weight and low power, adapted to customer requirements, with unified interfaces.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.