CAS-5A Amateur Radio Satellite

User's Manual
Ver. 1.0

Fengtai OSCAR-118

BA1DU, Alan Kung
2022-12-15

CAS-5A Amateur Radio Satellite User's ManualCAS-5A Amateur Radio Satellite User's Manual
V1.0 2022-12-15
Alan Kung, BA1DUThe CAMSAT CAS-5A amateur radio satellite was piggybacked on the Smart Dragon-3
Y1 launch vehicle and launched from the sea launch platform in the Yellow Sea at UTC
06:35:02 on December 9, 2022. After 724 seconds, the satellite successfully separated
from the launch vehicle and entered the intended orbit. The satellite orbit is a circularsun-synchronous orbit with an altitude of 543 kilometers and an inclination of 97.53
degrees, the running cycle is 95.575minutes. AMSAT has designated CAS-5A satellite as
Fengtai-OSCAR 118 (FO-118).

The CAS-5A was launched aboard an SD-3 rocket

The CAMSAT team works at the rocket plant

The functions of CAS-5A satellite include UHF CW telemetry beacon, GMSK telemetry
data transmission, V/U mode linear transponder, V/U mode FM transponder, H/U modelinear transponder, three visible light band space cameras.
1 / 23V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

Students and teachers participating in the CAS-5A project

After the satellite completes the in-orbit test and works normally, the space camera
photo download will be open to amateur radio enthusiasts all over the world. When therelevant remote control command is received by the satellite, the GMSK telemetry
channel will be used to downlink the photo catalog and photo data, and the telemetry
data will stop sending at that time.
CAS-5A satellite adopts a 6U CubeSat structure with a mass of about 7kg, an on-orbit
envelope size of 366x226x100mm (antennas not included) with six sides body-mounted
solar panels and a three-axis stabilized attitude control system is used, long-term power
consumption is about 10 Watts.

2 / 23V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

1、Technical specifications:● VHF antenna: 1/4 wavelength whip antenna● UHF antenna: two 1/4 wavelength whip antenna● HF antenna:

whip antenna● CW telemetry beacon:●Frequency: 435.570MHz ●RF power: 20dBm ●CW rate: 22wpm● GMSK telemetry:●Frequency: 435.650MHz ●RF power: 25dBm ●Data rate: 4800/9600bps● V/U mode linear transponder:●Uplink frequency: 145.820MHz ●Downlink frequency: 435.540MHz●RF power: 23dBm ●Bandwidth: 30kHz ●Spectrum inverted● V/U mode FM transponder:●Uplink frequency: 145.925MHz ●Downlink frequency: 435.600MHz●RF power: 23dBm ●Bandwidth: 16kHz● H/U mode linear transponder:●Uplink frequency: 21.435MHz ●Downlink frequency: 435.505MHz●RF power: 23dBm ●Bandwidth: 15kHz ●Spectrum normal● Photo download remote control:●Frequency: 145.975MHz●RF modulation: FM, frequency deviation ±3kHz●Subcarrier: DTMF ( dual-tone multi-frequency )3 / 23V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's ManualCAS-5A Satellite receiving spectrum

CAS-5A Satellite transmitting spectrum

2、CW Telemetry Beacon Description：（1）

CW beacon sending sequence● Send stop interval time: 5s● CW sending rate: 22wpm

4 / 23V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual（2）CW beacon frame format
Sending

Sending

order

content

1

BJ1SO

Satellite call sign

2

CAS5A

Telemetry information start identifier

3

CAS5A

Telemetry information start identifier

4

CH1

Telemetry channel 1

Description

Remarks

Send in standard Morse code

Send this channel
5

CH2 ~ CH31

Telemetry channel 2~Telemetry channel 31

information, see [Digital
Code Table] below

6

CAMSAT

Telemetry information end flag
Send in standard Morse code

7

CAMSAT

Telemetry information end flag

The telemetry data (CH2 to CH31) are coded as follows:
Digital Code Table
Digital

Code

0

T

1

A

2

U

3

V

4

4

5

E

6

6

7

B

8

D

9

N

5 / 23V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual（3）CW beacon telemetry information and data analysis
ChannelParameter name

Type

Value range

Mini.

Parsing algorithm

Max.

Unit

XYZ:
X: 4=4800bps, 9=9600bps GMSK telemetry rate
YZ:
01 = All asleep
02 = Beacon on (send every 5 minutes)
03 = Beacon on (send every 5 seconds from mode 3 to mode 10)
04 = Beacon on + AX.25 telemetry
05 = Beacon on + AX.25 telemetry + V/U linear transponder

CH1

Current operating mode

state

000

999

06 = Beacon on + AX.25 telemetry + V/U linear transponder + H/U linear transponder
07 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/U--linear transponder
08 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/Ulinear transponder + H/T linear transponder
09 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/Ulinear transponder + H/T linear transponder + heater 1
10 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/Ulinear transponder + H/T linear transponder + heater 1 + heater 2(H/T linear transponder is not valid in CAS-5A)

CH2
CH3
CH4

CW telemetry frame transmission
counter
Remote control commandreceiving counter
Primary power supply voltage

data

000

255

data

000

255

data

000

999

6 / 23Every time a frame is sent, the CW telemetry frame counter isincremented by 1, and starts counting from 000 when it is fullEvery time a remote control command is received, the counter isincremented by 1, and start counting from 000 when it is full

Time
Time
V

U=N/10V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

ChannelParameter name

Type

Value range

Mini.

Max.

Parsing algorithm

Unit

CH5

3.8V bus voltage

data

000

999

U=N/100

VCH6

5.5V bus voltage

data

000

999

U=N/100

V

CH7

Battery voltage

data

000

999

U=N/10V

CH8Solar array current

data

000

999

I=N/100A

CH9Primary bus current

data

000

999

I=N/100

A

CH10

Total load current

data

000

999

I=N/100

A

CH11

VHF receiver current

data

000

999

I=N

mA

CH12

UHF transmitter1 current

data

000

999

I=N

mA

CH13

UHF transmitter2 current

data

000

999

I=N

mA

CH14

Reserved

data

000

999

I=N

mA

CH15

VHF AGC voltage

data

000

999

U=N/100

V

CH16

UHF transmitter1 RF power

data

00

99

P=600+NmW

CH17

UHF transmitter2 RF power

data

000

999

P=N/100mW

CH18

Reserved

data

000

999

P=N/100mW

CH19

IHU temperature

data

000

999

CH20

Battery 1 temperature

data

000

999

When X is 0-2, it represents a positive temperature; X is 3-4, it

℃

CH21

Battery 2 temperature

data

000

999

represents a negative temperature.

℃

CH22

UHF1 PA temperature

data

000

999

7 / 23℃

XYZ℃

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

ChannelParameter name

Type

Value range

Mini.

Max.

Parsing algorithm

T=N(N≤300)

Unit

CH23

UHF2 PA temperature

data

000

999

CH24

Camera 3 temperature

data

000

999

CH25

Camera 1 temperature

data

000

999

CH26

+X Cabin Plate Inner Temperature

data

000

999

000 ： 0℃℃

CH27

-X Cabin Plate Inner Temperature

data

000

999

025 ： 25℃℃

CH28

PCDU Temperature

data

000

999

CH29

DC/DC Temperature

data

000

999

CH30

+Z Cabin Plate Inner Temperature

data

000

999

391 ： -91℃

℃

CH31

-Z Cabin Plate Inner Temperature

data

000

999

421 ： -121℃℃

8 / 23

T=-1x (N-300) (N>300)
For example:

125 ： 125℃
301 ： -1℃
311 ： -11℃

V1.0 by BA1DU

℃
℃
℃

℃
℃

CAS-5A Amateur Radio Satellite User's Manual

3、GMSK telemetry data：（1）GMSK telemetry frame format and communication protocol
CAS-5A satellite GMSK telemetry data is sent in the AX.25 UI frame format. Callsign is BJ1SO.
The user data of each frame is 167 bytes, and the allocation is as follows:
Function code

Telemetry data content

7Byte

160ByteW0~W6：0x0100010001007E

W7~W166（2）GMSK telemetry data format and analysis method
SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
W1-Year: 00～99, representing 2000～2099
W2-Month: 01～12, representing January to December

1

W7

6Byte

W3-Day: 01～31, representing 1st～31stSatellite time

W4-Hour: 00～23, representing 0:00～23:00
W5-minute: 00～59, representing 0 minutes～59 minutes
W6-second: 00～59, representing 0 seconds～59 seconds

2

W13

1Byte

IHU total reset counter
9 / 23

W1 is an integer. Restart counting from 0 after counting up

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
Range: 0～255
b7~b1: reserved, all values are 0
b3: Battery heater 2 switch state (0 off/1 on)

3

W14

1Byte

b2: Battery heater 1 switch state (0 off/1 on)Battery statusb1: Battery discharge switch state (0 off/1 on)
b0: Battery discharge switch off allowable state (0 energy disabled/1
enabled)

4

W15

1Byte

Remote control frame reception counter

5

W16

1Byte

Remote control command execution counter

6

W17

1Byte

Telemetry Frame Transmission Counter

W1 is an integer. Restart counting from 0 after counting up
Range: 0～255
W1 is an integer. Restart counting from 0 after counting up
Range: 0～255
W1 is an integer. Restart counting from 0 after counting up
Range: 0～255
b7: IHU flash2 read and write failure (0 normal/1 fault)
b6: Remote control command CRC correctly identified (0 error/1 correct)
b5: IHU flash1 read and write failure (0 normal/1 failure)

7

W18

1Byte

b4: CPU I/O acquisition watchdog switch flag (0 off/1 on)

IHU status 1b3: reserved, value 0
b2: ADC Software Watchdog Switch Flag (0 Off/1 On)
b1: Temperature measurement software watchdog switch sign (0 off/1 on)
b0: Remote control software watchdog switch sign (0 off/1 on)

8

W19

1Byte

W1 is an integer. Restart counting from 0 after counting up

Reserved

Range: 0～255
10 / 23

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
b7~b5: reserved, all values are 0
b4: Temperature1-I2C fault (0 normal/1 fault)

9

W20

1Byte

b3: Temperature2-I2C fault (0 normal/1 fault)

I2C bus statusb2: Temperature3-I2C fault (0 normal/1 fault)
b1: ADC-I2C fault (0 normal/1 fault)
b0: Clock-I2C fault (0 normal/1 fault)

10

W21

1Byte

Reserved

11

W22

1Byte

Reserved

12

W23

1Byte

Reserved

W1 is an integer. Restart counting from 0 after counting up
Range: 0～255
W1 is an integer. Restart counting from 0 after counting up
Range: 0～255
W1 is an integer. Restart counting from 0 after counting up
Range: 0～255
b7: Board-to-board communication failure (0 normal/1 fault)
b6: Flash2 read and write failure of the camera board (0 normal/1 failure)b5: Flash1 read and write failure of the camera board (0 normal/1 failure)

13

W24

1Byte

B4: Antenna deployment master switch state (0 off/1 on)

IHU status 2

b3: UHF antenna 1 deployment state (0 undeployed/1 deployed)
b2: UHF antenna 2 deployment state (0 undeployed/1 deployed)
b1: VHF antenna deployment status (0 undeployed/1 deployed)b0: HF antenna deployment state (0 undeployed/1 deployed)
b7~b3: Reserved, all values are 0

14

W25

1Byte

IHU status 3b2: Satellite Separation Status (0 Not Separated /1 Separated)
b1: Reserved, value 0
11 / 23

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
b0: Delay telemetry switch state (0 off/1 on)

15

W26

1Byte

+X cabin plate inner temperature

16

W27

1Byte

-X cabin plate inner temperature

17

W28

1Byte

PCDU Temperature

18

W29

1Byte

DC/DC Temperature

19

W30

1Byte

+Z cabin plate inner temperature

20

W31

1Byte

-Z cabin plate inner temperature

21

W32

1Byte

+X solar array temperature

22

W33

1Byte

-X solar array temperature

23

W34

1Byte

+Y solar array temperature

24

W35

1Byte

-Y solar array temperature

25

W36

1Byte

+Z solar array temperature
12 / 23b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

length

26

W37

1Byte

-Z solar array temperature

27

W38

1Byte

Battery pack 1 temperature 1

28

W39

1Byte

Battery pack 1 temperature 2

29

W40

1Byte

Battery pack 2 temperature 3

30

W41

1Byte

Battery pack 2 temperature 4

31

W42

1Byte

IHU temperature

32

W43

1Byte

UHF1 PA temperature

33

W44

1Byte

Camera 3 temperature

34

W45

1Byte

Camera 1 temperature

35

W46

1Byte

Camera 2 temperature

36

W47

1Byte

UHF2 PA temperature

37

W48

2Byte

Battery voltage

Telemetry data function description

Telemetry data parsing algorithm
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
b7 of W1 is the sign bit, 0 is positive, 1 is negative; b6~b0 are numerical bits
Range: -100～+100(℃)
W1 is the integer part, W2 is the decimal part (1 decimal place)

13 / 23

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
Range: 0～15.0(V)

38

W50

2Byte

Primary power supply voltage (12V)

39

W52

2Byte

3.8V bus voltage

40

W54

2Byte

5.5V bus voltage

41

W56

2Byte

IHU 3.3V voltage

42

W58

2Byte

Total solar array current

43

W60

2Byte

Primary bus current

44

W62

2Byte

Total load current

45

W64

2Byte

IHU current

46

W66

2Byte

Reserved

47

W68

2Byte

HF receiver current

48

W70

2Byte

Reserved

W1 is the integer part, W2 is the decimal part (1 decimal place)
Range: 0～15.0(V)W1 is the integer part, W2 is the decimal part (2 decimal places)
Range: 0～5.00(V)W1 is the integer part, W2 is the decimal part (2 decimal places)
Range: 0～10.00(V)W1 is the integer part, W2 is the decimal part (2 decimal places)
Range: 0～5.00(V)W1W2 is an integer
Range: 0～3000(mA)
W1W2 is an integer
Range: 0～2000(mA)
W1W2 is an integer
Range: 0～1000(mA)
W1W2 is an integer
Range: 0～500(mA)
W1W2 is an integer
Range: 0～1000(mA)
W1W2 is an integer
Range: 0～1000(mA)
W1W2 is an integer
Range: 0～2000(mW)

14 / 23

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

length

49

W72

2Byte

UHF transmitter 2 current

50

W74

2Byte

H/T AGC voltage

51

W76

2Byte

UHF transmitter 1 current

52

W78

2Byte

UHF1 RF power

53

W80

2Byte

UHF2 RF power

54

W82

2Byte

VHF receiver current

55

W84

2Byte

VHF AGC voltage

Telemetry data function description

Telemetry data parsing algorithm
W1W2 is an integer
Range: 0～1000(mA)
W1 is the integer part, W2 is the decimal part (2 decimal place)
Range: 0～5.00(V)W1W2 is an integer
Range: 0～1000(mA)
W1W2 is an integer
Range: 0～3000(mW)
W1W2 is an integer
Range: 0～3000(mW)
W1W2 is an integer
Range: 0～1000(mA)
W1 is the integer part, W2 is the decimal part (2 decimal place)
Range: 0～5.00(V)W1-Year: 0～99, representing 2000～2099
W2-Month: 01～12, representing January to December

56

W86

6Byte

Delayed telemetry start time

W3-Day: 01～31, representing 1st～31st
W4-Hour: 00～23, representing 0:00～23:00
W5-minute: 00～59, representing 0 minute～59 minutes
W6-second: 00～59, representing 0 second～59 seconds
W1-Hour: 00～23, representing 0:00～23:00

57

W92

3Byte

Delayed telemetry interval setting

W2-Minute: 00～59, representing 0 minute～59 minutes
W3-second: 00～59, representing 0 second～59 seconds

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V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

length

58

W95

3Byte

Frequency of delayed telemetry setting

59

W98

2Byte

The camera controller operating current

60

W100

2Byte

The operating voltage of the camera controller

61

W102

2Byte

Total camera current

Telemetry data function description

Telemetry data parsing algorithm
W1W2W3 is an integer
Range: 0 ~ 16777215
W1W2 is an integer
Range: 0～500(mA)
W1 is the integer part, W2 is the decimal part (2 decimal place)
Range: 0～5.00(V)W1W2 is an integer
Range: 0～2000(mA)
b7: Camera controller power switch status (0 off/1 on)
b6: reserved, value 0
b5: Camera 1 power switch status (0 off/1 on)

62

W104

1Byte

Camera working status

b4: Camera 1 delayed photography switch status (0 off/1 on)
b3: Camera 2 power switch status (0 off/1 on)
b2: Camera 2 delayed photography switch status (0 off/1 on)
b1: Camera 3 power switch status (0 off/1 on)
b0: Camera 3 delayed photography switch status (0 off/1 on)

63

W105

2Byte

Camera 1 photo counter

64

W107

2Byte

Camera 2 photo counter

65

W109

2Byte

Camera 3 photo counter

66

W111

6Byte

Camera 1 Delayed Photography start time
16 / 23

W1W2 is an integer
Range: 0 ~ 2047
W1W2 is an integer
Range: 0 ~ 2047
W1W2 is an integer
Range: 0 ~ 2047
W1-Year: 0～99, representing 2000～2099

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
W2-Month: 01～12, representing January to December
W3-Day: 01～31, representing 1st～31st
W4-Hour: 00～23, representing 0:00～23:00
W5-minute: 00～59, representing 0 minute～59 minutes
W6-second: 00～59, representing 0 second～59 seconds
W1-Hour: 00～23, representing 0:00～23:00

67

W117

3Byte

Camera 1 Delayed Photography interval setting

W2-Minute: 00～59, representing 0 minute～59 minutes
W3-second: 00～59, representing 0 second～59 seconds

68

W120

1Byte

Camera 1 Frequency of delayed Photography

W1 is an integer

setting

Range: 0 ~ 60
W1-Year: 0～99, representing 2000～2099
W2-Month: 01～12, representing January to December

69

W121

6Byte

Camera 2 Delayed Photography start time

W3-Day: 01～31, representing 1st～31st
W4-Hour: 00～23, representing 0:00～23:00
W5-minute: 00～59, representing 0 minute～59 minutes
W6-second: 00～59, representing 0 second～59 seconds
W1-Hour: 00～23, representing 0:00～23:00

70

W127

3Byte

Camera 2 Delayed Photography interval setting

W2-Minute: 00～59, representing 0 minute～59 minutes
W3-second: 00～59, representing 0 second～59 seconds

71

W130

1Byte

72

W131

6Byte

Camera 2 Frequency of delayed Photography

W1 is an integer

setting

Range: 0 ~ 60

Camera 3 Delayed Photography start time

W1-Year: 0～99, representing 2000～2099

17 / 23

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
W2-Month: 01～12, representing January to December
W3-Day: 01～31, representing 1st～31st
W4-Hour: 00～23, representing 0:00～23:00
W5-minute: 00～59, representing 0 minute～59 minutes
W6-second: 00～59, representing 0 second～59 seconds
W1-Hour: 00～23, representing 0:00～23:00

73

W137

3Byte

Camera 3 Delayed Photography interval setting

W2-Minute: 00～59, representing 0 minute～59 minutes
W3-second: 00～59, representing 0 second～59 seconds

74

W140

1Byte

Camera 3 Frequency of delayed Photography

W1 is an integer

setting

Range: 0 ~ 60
W1 is an integer
Range: 0 ~ 10
01 = All asleep
02 = Beacon on (send every 5 minutes)
03 = Beacon on (send every 5 seconds from mode 3 to mode 10)
04 = Beacon on + AX.25 telemetry

75

W141

1Byte

Satellite current operating mode

05 = Beacon on + AX.25 telemetry + V/U linear transponder
06 = Beacon on + AX.25 telemetry + V/U linear transponder + H/U linear transponder
07 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/Ulinear transponder
08 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/Ulinear transponder + H/T linear transponder
09 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/Ulinear transponder + H/T linear transponder + heater 1
10 = Beacon on + AX.25 telemetry + V/U linear transponder + FM transponder + H/U

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V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
linear transponder + H/T linear transponder + heater 1 + heater 2(H/T linear transponder is not valid in CAS-5A)

b15~b10: Reserved, all values are 0
b9: GMSK telemetry data rate (0-9.6kbps/1-4.8kbps)
b8: RF power status (0 low power / 1 high power)
b7: V/U FM transponder switch state (0 off/1 on)
b6: V/U linear transponder switching state (0 off/1 on)

76

W142

2Byte

Satellite device switch status

b5: UHF beacon switch status (0 off/1 on)
b4: UHF GMSK telemetry switch state (0 off/1 on)
b3: H/U linear transponder switching state (0 off/1 on)
b2: H/T linear transponder switching state (0 off/1 on)
b1: HF beacon switch status (0 off/1 on)
b0: Working mode status (0 auto/1 manual)
W1-Year: 00～99, representing 2000～2099
W2-Month: 01～12, representing January to December

77

W144

6Byte

48 hours reset time

W3-Day: 01～31, representing 1st～31st
W4-Hour: 00～23, representing 0:00～23:00
W5-minute: 00～59, representing 0 minutes～59 minutes
W6-second: 00～59, representing 0 seconds～59 seconds

78

W150

2Byte

Attitude quaternion q0

79

W152

2Byte

Attitude quaternion q1
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W1W2：Q0L Q0H
q0=((Q0H<<8)|Q0L)/32768
W1W2：Q1L Q1H
q1=((Q1H<<8)|Q1L)/32768

V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

length

80

W154

2Byte

Attitude quaternion q2

81

W156

2Byte

Attitude quaternion q3

Telemetry data function description

Telemetry data parsing algorithm
W1W2：Q2L Q2H
q2=((Q2H<<8)|Q2L)/32768
W1W2：Q3L Q3H
q3=((Q3H<<8)|Q3L)/32768
W1 is an integer

82

W158

1Byte

Camera 1 resolution

Range: 0 ~ 7
0：800×480；1：1280×720；2：320×240；
3：1440×896；4：640×480；5：1920×1080；
6：800×600；7：1024×768

W1 is an integer

83

W159

1Byte

Camera 1 image quality

Range: 0 ~ 2
0: Highest quality; 1: Medium quality; 2: Low quality
W1 is an integer

84

W160

1Byte

Camera 2 resolution

Range: 0 ~ 7
0：800×480；1：1280×720；2：320×240；
3：1440×896；4：640×480；5：1920×1080；
6：800×600；7：1024×768

W1 is an integer

85

W161

1Byte

Camera 2 image quality

Range: 0 ~ 2
0: Highest quality; 1: Medium quality; 2: Low quality
W1 is an integer

86

W162

1Byte

Camera 3 resolution

Range: 0 ~ 7
0：800×480；1：1280×720；2：320×240；
3：1440×896；4：640×480；5：1920×1080；
6：800×600；7：1024×768

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V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

SendingStarting

Data

order

position

lengthTelemetry data function description

Telemetry data parsing algorithm
W1 is an integer

87

W163

1Byte

Camera 3 image quality

Range: 0 ~ 2
0: Highest quality; 1: Medium quality; 2: Low quality
W1-Hour: 00～23, representing 0:00～23:00

88

W164

3Byte

The current delayed telemetry interval setting

W2-Minute: 00～59, representing 0 minute～59 minutes
W3-second: 00～59, representing 0 second～59 seconds

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V1.0 by BA1DUCAS-5A Amateur Radio Satellite User's Manual

4、Space camera photo data：
The application will be available later.

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V1.0 by BA1DU