Untitled Document

FM Telemetry Receiving

�P�DStructure of FM telemetry

CUTE-I FM telemetry is organized with two type frame, frame0type and frame1type. �@ Each frame contains 32byte of data: 8byte for header section, 24byte for frame data section. The following diagram shows the breaf picture of FM telemetry frame.

Header(8byte)

Frame Data(24byte)

2. Header Data

�@The following table shows the construction of header data.

Table1 Construction of Header Data

byte		Meaning
0		Satellite Time
1
2
3
4		Packet No.
5	0	Frame No.
	1	Test Flag
	2	Operating Mode
	3	Mem.Status
	4
	5	Packet Interval
	6
	7
6		Engineering DataI
7		Engineering DataII

3. Frame Data

3.1 Frame 0

Table3 shows the construction of Frame 0 Data. Data from CUTE-I follows the order of Table3. Each address size is 1byte.

Table3 Frame 0 Data

address	Item	bit
data 0	SMeter	8
data 1	Sun Sensor Output 0	8
data 2	Sun Sensor Output 1	8
data 3	Gyro 1x	8
data 4	Gyro 1y	8
data 5	Gyro 2x	8
data 6	Gyro 2y	8
data 7	Accelerometer 1x	8
data 8	Accelerometer 1y	8
data 9	Accelerometer 2x	8
data 10	Accelerometer 2y	8
data 11	Battery Voltage	8
data 12	Bus50 Voltage	8
data 13	Bus33 Voltage	8
data 14	Solar Cell Voltage	8
data 15	Battery Current	8
data 16	Cell0 Current	8
data 17	Cell1 Current	8
data 18	Cell2 Current	8
data 19	Cell3 Current	8
data 20	Cell4 Current	8
data 21	Cell5 Current	8
data 22	Cell6 Current	8
data 23	Cell7 Current	8

3.2 Frame 1

Table4 shows the construction of Frame 1Data. Data from CUTE-I follows the order of Table4. Each address size is 1byte.

Table4 Frame 1 Data

address	Item	bit
data 0	Memory Area	8
data 1	Memory Pointer	8
data 2	Sampling Rate	8
data 3	FM Time	8
data 4	Sun Sensor Status1	8
data 5	Sun Sensor Status2	8
data 6	Thermistor Gyro1	8
data 7	Thermistor Gyro2	8
data 8	Thermistor Accelerometer1	8
data 9	Thermistor Accelerometer2	8
data 10	Thermistor Wall0	8
data 11	Thermistor Wall1	8
data 12	Thermistor Wall2	8
data 13	Thermistor Wall3	8
data 14	Thermistor Wall4	8
data 15	Thermistor Wall5	8
data 16	Thermistor Power1	8
data 17	Thermistro Power2	8
data 18	Thermistor OBC	8
data 19	Thermistro Communication	8
data 20	Thermistor Battery	8
data 21	Referecne Voltage	8
data 22	Reset Count	8
data 23	TNC Error	8