Beacon Format

The following information is for the decoding of data packets for uplink and downlink.
They are open to the public. If you receive any data, we would be more than happy to receive them. 

Downlink

 Name  Size (ASCII)   Description   Units  
 V  1 byte  Voltage  Volts
 T  1 byte  Temperature  degrees of Celcius 
 I1to I28
 I1 to I28  Current  Microampere 
 w.w   5 byte  Voltage  volts
 A1  6 byte  !AIVDM packet  ASCII
 A2  1 byte  Count of fragments in the currently accumulating message   ASCII
 A3  1 byte  Fragment number of this sentence   ASCII
 A4  1 byte  A sequential message ID for multi-sentence messages  ASCII
 A5  1 byte  A radio channel code  ASCII
 A6  -  Data payload  ASCII
 A7  1 byte  Number of fill bits requires to pad the data payload to a 6 bit boundary   ASCII
 A8  3 byte  NMEA 0183 data-integrity checksum for the sentence   ASCII 
 Website  17 byte  URL of Lambdasat's website  url


Message  Raw Data  Size (ASCII) 
 Graphene   ***VTIII...III*VTIII...I*...***  192
 AIS  !AIVDM,...  168
 Website  www.lambdasat.com  17

Interpreting the data from Graphene:

Voltage  Temperature  Current 
 a=0.3932584
 b=-50.260896 
 Vgout = a*V+b
 a=0.8695652
 b=-61.304347 
 Tout = a*T+b 
 a=0.39215
 for 0-100 μA 
 Igout = a*I*10^-6 


Uplink

*, PIC, AIS, IRID, GRAPHENE, HAM, HAM_REPEATS, REPEATS1, REPEATS2, MSG_COUNTER, AIS_IR, GRAPHENE_IR, HKD_IR

*: indicator - start of message

PIC: [1,2,3] Number of microcontroller working on main computer

AIS:[1,0]  1:AIS receiver ON     0:AIS receiver OFF

IRID:[1,0]   1: Iridium modem ON       0:Iridium modem OFF

GRAPHENE:[1,0]   1:Graphene experiment ON     0:Graphene experiment OFF 

HAM:[1,0]   1:HAM transmitter on                0:HAM transmitter OFF

HAM_REPEATS:  [1-9] Number of data transmittion  via HAM

REPEATS1: [0-9] Number X10 of message transmittion via HAM

REPEATS2: [0-9] Number X1 of message transmittion via HAM

MSG_COUNTER: [1-9] Delay X3minutes between messages transmittion via HAM

AIS_IR: [1,0]        1:AIS data transmittion via Iridium   0: no AIS data transmittion via Iridium

GRAPHENE_IR: [1,0] 1:Graphene data transmittion via Iridium   0: no Graphene data transmittion via Iridium

HKD_IR: [1,0]  1:HKD data transmittion via Iridium    0: no HKD data transmittion via Iridium