PDHU
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PDHU : Payload Data Hanfling Unit
PDHU is a core device of satellite payload to transmit large input data from observation sensors to the ground station.
The transmission of PDHU is processed in real time by high-speed compression, storage, encryption, and channel codification.
We localized technologies of high-speed data processing device for KOMPSAT 3 and KOMPSAT 3A and developed the PDHU
which will be applied to the next satellite.
Specifications of the PDHU applying to the next satellite are as follows.
| Item | Specification |
|---|---|
| Input | Serial LVDS (2Gbps per channel) x 5 |
| Output | LVDS (160Mbps per channel) x 4 or Serial LVDS (640Mbps per channel) x 2 |
| Compression standard | CCSDS 122-B-1 (DWT / BPE) (DWT : Discrete Wavelet Transform, BPE : Bit Plane Encoder) |
| Memory capacity | 256Gbits per memory module x 5 |
| Encryption | 3-DES |
| Data output format | CCSDS |
| TC/TM interface | MIL-STD-1553B |
| Power consumption | ≤ 300.0 Watt (peak) |
| Weight | ≤ 35.0Kg |
| Size | 652mm x 344mm x 201mm |
