Home

SPACEDOS

Physical dimensions

Large view

Energetic range and Climatic endurance

from 200 keV to 9 MeV from -50 ℃ to +50 ℃ within wrror +50 keV

Electrical interface

Signal	Description
PC7	Universal IO pin
PC3	Universal IO pin
RX0	RS232 Receive (3.3 V)
TX0	RS232 Transmit (3.3 V)
RST#	Reset (trough capacitor)
GND	Ground
3V3	Power supply +3.3 V
5V	Internally connected to +3.3 V

Power consumption: 2.6 mA from 3.3 V

Communication protocol

Sample of output data

#Cvak...
#Hmmm...
$DPSD,0000000e,660b,0000,0000,0000,0000,0000,0000,0000,0000,0102
$HKSD,0,14,36049,256,0,3363,26123,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
$DPSD,0000001e,67f7,0000,0001,0000,0000,0000,0000,0000,0000,0102
$HKSD,1,30,35924,256,0,2995,26615,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

SPACEDOS sends $DPSD a $HKSD messages each cca 15 seconds.

Communication speed is 2400 baud.

Power On

#Cvak…

Initiation complete

#Hmmm...

Initiation is completed up to one second.

SpaceDos Data Payload message

$DPSD, <uptime>, <noise channel>, <0.1 MeV>, <0.14 MeV>, <0.21 MeV>, <0.33 MeV>, <0.66 MeV>, <1.68 MeV>, <4.72 MeV>, <'>=9 MeV'>, <DC offset>

Value	Length	Type	Note
$DPSD	5 B	Char	Header
uptime	4 B	Hex	Time from power on
noise channel	2 B	Hex	this channel containing noise
0.1 MeV	2 B	Hex	number of particles with absorbed energy above 0.1 MeV
...	...	...
'>=9' MeV	2 B	Hex	Overrange particles
DC offset	2 B	Hex	Offset of ADC

Minimal data payload (without timemark) is 18 B per 15 s => 103680 B per day

SpaceDos HouseKeeping message

$HKSD, <measurement No.> , <uptime>, <filter suppressions>, <position of the 1-st channel>, <1-st ch.>, <2-nd ch.>, <3-rd ch.>,...

Value	Range	type	Note
$HKSD	fix	Char	Header
measurement No.	0..65535	Dec
uptime	0..4294967295	Dec
filter suppressions	0..65535	Dec	Number of ussage of digital filter for double peak suppression
position of the 1-st channel	0..511	Dec
1-st ch.	0..65535	Dec	Number of events in 1-st ch.
2-nd ch.	0..65535	Dec	Number of events in 2-nd ch.
...	...