VEGA Data Storage

Expected Data Packet:

General

Time  (seconds) = 9 bits

2^9 = 512 seconds = 8.53 minutes

Altitude

Altitude (m) = 12 bits = 4096m max

12k feet = 3657 m

Acceleration

X, Y, Z acceleration = 12 bits each

Maximum = ±15.99 (remove the decimal) = ±1599

2^12 = 4196 = ±2048

Heading

Pitch, Roll, Yaw = 9 bits each

Maximum = ±180

2^9 = 512 = ±256

Total Bits = 9 + 12 + 12*3 + 9*3 = 84 bits = 10.5 bytes = 11 bytes

11 bytes  at 5 Hz = 55 Bytes / Second

128000 Bytes / 55 bytes per sec = 2327 seconds = 38.78 minutes of data

Ideally, there is a rolling buffer of data, waiting for takeoff. Once takeoff happens, ignore / erase the previous data aside from maybe 5 seconds before