Test Flight Data

[neiloakley]

Successful test flights yesterday. 3 flights with both loggers installed (6 data sets).

Unfortunately, the config was set to start a new file after 180,000 rows of data which works out to roughly 14 minutes of logging time. I have now increased this to 360,000 which should be plenty for a 20 minute flight. There is an option to only begin recording when a certain height above the base altitude is reached, but inaccuracies in the GPS data (vdop) might cause this to start/stop recording data during a flight so I wont use this feature for now, instead rely on manually starting the loggers before each flight.

The position in the Perkoz meant both loggers buttons were accessible to the front seat pilot.

Observations on the test data:

• Time is in seconds since epoch
• GPS data doesn't include height or speed
• Pressure is recorded in Pa, so could be converted into height/altitude
• Temperature is recorded in millidegrees C
• GPS height and MSL are subject to large errors when vdop increases - there is a config option to exclude GPS data when vdop or hdop increases beyond a set threshold. This isn't implemented yet as it could be done in post processing.

Test Flights 1 and 3 were general sorties with an instructor and student teaching/learning sports manouvers.

Test Flight 2 was a full sports sequence (2024 Known 1).

The rear logger didn't seem to record test flight 1, and only captured part of test flight 2. This could have been user error.

[neiloakley]

; PRODUCT_ID = IMU-GPS+alt
; sensor data priority
; accel->gyro->mag->pressTemp->gps
; sample rates must be in descending order
; load into spreadsheet as comma separated but
; do not merge delimitors

: ACCEL GYRO PARAMETERS
; available sample rates are 12, 26, 52, 104, 208, and 416
; sample rate affects both accel and gyro
ag_sampleRate = 208
; available HPF filter rate are 0, 16, 65, 260, 1000 milliHz
ag_gyroHpf = 65
; available full scale ranges are 125 250, 500, 1000 and 2000 degrees per sec (dps)
ag_gyroFullScale = 250
; available full scale ranges are 2, 4, 8 and 16 g
ag_accelFullScale = 8

; MAGNETOMETER PARAMETERS
; availble sample rates are 1, 10, 20 50, 100 and 200 Hz, YES
mag_SampleRate= 20

; PRESSURE SENSOR PARAMETERS
;add pressure to data stream
press_pressOn
; the pressure interval is the pressure transucer measurement interval, in milliseconds
press_sampleInterval=10
;add temperature to data stream
press_tempOn
press_tempSubSample=0
; the trigger is measured in meters above turn-on location
;press_triggerHeight = 10

; GPS PARAMETERS
gpsOn = 1
; minimum hdop required, in meters
;gps_MinLock = 40

;gps_update interval, in seconds
gps_sampleinterval = 0.1

; discipline RTC with GPS time
; expressed in seconds, RevNew user manual is incorrect
gps_clockThreshold = 0.100

; dynamic models 0-->potable 2-->stationary 3-->pedestran 4--> automotive, 5-->sea, 6,7,8-->airborn
gps_dynamicModel = 7
;gps_gnssGlonass = 0x01010001 ; enable
; disable Glonass
;gps_gnssGlonass = 0x01010000

; minlock minimum HDOP in meters considered to be acceptable lock
gps_minlock = 40
; discard gps readings that exceed the minimum HDOP
;gps_nobad

; used in on/off mode number of good samples to collect before turning off
;gps_numSamples = 1
; used in on/off mode, time in seconds device will spend trying to collect good samples
;gps_powerOnTime = 50.0
; used in on/off mode, time, in seconds bewteen on events
;gps_powerPeriod = 300.0

; extra parameters to logger operation
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; FILE PARAMETERS
;set file size to 30 minutes of data
samplesperfile = 180000
; custom directory name
;dirname = /DATA
; custom file prefix
;filename = areo

; EVENT DETECTOR PARAMETERS
deadband = 0
DeadBandTimeout = 5
dwell=100

; set timestamp to UTC seconds since Jan 1, 1970 instead of time since start of file
absoluteTime

;control brightness of LEDs, values are 'off' or 'high'
statusindicators = high

;uncomment following line to activate logger upon disconnect from USB
;rebootOnDisconnect

; wakeupTime uses crontab format, except that six fields are required
; an there is a second in the minuite field (the 6th field
; rtc alarm to wake up system
; wakeupTime = 0 5,35 * * * * ; wakes up system at 5 and 35 minute after the hour
; wakeupTime = 0 0,15,30,45 * * * * ; wakes up system
;wakeupTime = 0 * * * * * ;wakes up system every minute
; wakeupTime = 0 0 2,8 0 0 0 ;wakes up system at 2 and 8 AM
;wakeupTime = 0, */2 * * * *
; default secsToRecord is 0 , (off)
;secsToRecord = 60
; logical, default is to remain turned on
;offOnEndRecord
;fileappend