Cute-1.7 + APD II Project - FM Telemetry Format -

Small Satellite Program (SSP)

Laboratory for Space Systems (LSS), Tokyo Institute of Technology

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Top How To RecieveFM Telemetry Format

FM Telemetry

FM Mode
Beginning 4 Bits	Packet Format
0	PDA Normal 3Frames
1	PDA Normal 2Frames
2	PDA Normal 1Frame
3	(Reserved)
4	(Reserved)
5	PDA Picture
6	PDA Compacted Sensor Data
7	PDA Main Update
8	PDA File Download
9	PDAComplete Sensor Data
A	DAQ Message
B	Comm. House Keeping
C	Comm. FRAM Read
D	Comm. Message
E	(Reserved)
F	Others

Comm. Frame

The communication subsystem generates 5 types of the FM packet frame.

• (FM Mode : B) Comm. HK : Satellite's HK (Housekeeping) data. Almost as same as those which are included in the CW frame.
• (FM Mode : C) FRAM Read : Downlink data which are stored in FRAM.
• (FM Mode : D) Ack : To tell operator that the satellite acknowledged a command.
• (FM Mode : D) Emergency : These packets will be transmitted in case of emergency.
• (FM Mode : D) Message : Trasmit a given message.

DAQ Frame

The DAQ generates 3 types of the FM packet frame.

• (FM Mode : A) DAQ Data Downlink : Data of sensors which are handled by DAQ(Gyro,Magnet)
• (FM Mode : A) DAQ Initial Gyro Downlink : Data of the Gyro Sensors just after the separation.

PDA Frame

The PDA generates 9 types of the FM packet frame.

• (FM Mode : 0) Normal 3 Frames : Satellite's HK Data, compacted (low accuracy) sensor data and attitude parameters divided into 3frames.
• (FM Mode : 1) Normal 2 Frames : Satellite's HK Data, compacted (low accuracy) sensor data and attitude parameters divided into 2frames.
• (FM Mode : 2) Normal 1 Frame : Satellite's HK Data, compacted (low accuracy) sensor data and attitude parameters.
• (FM Mode : 5) Picture : A single segment of picture data.
• (FM Mode : 6) Past Data : Compacted sensor data and attitude parameters related to ADCS. Data for 1sec in a single packet.
• (FM Mode : 7) Main Update : Informations about on-orbit PDA software update.
• (FM Mode : 8) File Download : A single segment of files in PDA to download it.
• (FM Mode : 9) Complete Sensor Data : Complete sensor data and attitude parameters related to ADCS. Data for 1sec in a single packet.
• (FM Mode : F) Message : Send given messages.

APD Frame

The APD generates 1 type of the FM packet frame.

• (FM Mode : D) APD Status : Status and detection counter value of the APD module.

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