DataFormat

This is the draft data format for the FieldSat.

The data stream consists of 32-byte packets. Each packet has a 4-byte timestamp and a 2-byte packet type tag at the beginning. The rest differs depending on the type of packet.

All multi-byte integer values are stored in little-endian (LSB first) order.

Run start (GO)

This is one packet written at the beginning of each run. Its purpose is to separate different runs that may be stored on one card.

4: Timestamp
2: Type tag "GO"
26: Padding

Primary sample (S1)

These are the samples that are taken as frequently as possible.

4: Timestamp
2: Type tag "S1"
2: X acceleration
2: Y acceleration
2: Z acceleration
2: X angular velocity
2: Y angular velocity
2: Z angular velocity
2: Solar luminosity
2: Solar voltage
10: padding

Secondary sample (S2)

These are other signals that are not sampled as frequently. These were not used in our mission, but could be used for extension in the future.

4: Timestamp
2: Type tag "S2"
2: Pressure
2: Internal temperature
2: External temperature
20: Padding

Solar deployment (SD)

4: Timestamp
2: Type tag "SD"
1: 0 undeploy, 1 deploy
27: Padding