KD7LMO - Pico Beacon


Payloads Payload Computer Micro Beacon Cut Down HF-APRS Video Link Pico Beacon Overview Block Diagram Hardware Mechanical Source Code Telemetry Data Logger NSRV Beacon APRS Beacon

Data Logger

The Pico Beacon contains an on board FDR (Flight Data Recorder). The FDR saves information to an 8M bit (1,048,576 bytes) serial flash memory. Information is saved once a second. Once recovered on the ground, the data is extracted from the FDR, processed, and saved in a comma separated text (ASCII) file. This file is suitable to read directly with common spread sheet, mapping, and scientific applications.

The following table contains the header name and description of each telemetry measurand.

Measurand	Description
UTC - hours	Time of log entry in UTC hours
minutes	Time of log entry in UTC minutes
seconds	Time of log entry in UTC seconds
latitude	Latitude in decimal degrees where + is north and - is south
longitude	Longitude in decimal degrees where + is east and - is west
altitude (m)	Altitude in meters to an accuracy of centimeters
altitude (ft)	Altitude in feet (calculated from reported altitude in cm)
GPS Status	16-bit hexadecimal GPS status as reported by Motorola M12+ Oncore
hdop/pdop	GPS Dilution of Position
visible sats	Number of visible satellites that could be used in GPS fix solution.
tracked sats	Number of tracked satellites used in the GPS fix solution.
Speed (2D)	2D speed in cm/second
Speed (3D)	3D speed in cm/second
heading	2D heading in tenths of a degree
bus voltage	Bus voltage in DC volts
ref voltage	Reference voltage (nominally 1.235 VDC)
temperature	Internal payload computer temperature in degrees Fahrenheit.
dist from lift off (nm)	Distance from start of flight in nautical miles.
heading (true)	Heading from start of flight in true (non-magnetic) degrees.
dist from last fix	Distance from last fix in nautical miles

Telemetry Measurands

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