Mobile Sensing Technology

An data line output from the UPOD has 35 comma delimited values.

UPODA1,2013.6.20,12:40:18,1371732018,502,408,381,0,0,0,0,0,0,0,0,-99.50,-99.50,27.90,83337.00,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,-999,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00

The values are identified as the following:

  1. UPOD model #
  2. Date YY.MM.DD
  3. Time HH:MM:SS
  4. Unix Time
  5. Baseline Mocon PID TVOC 10bit value
  6. S100 CO2 sensor 10bit value
  7. Atmega 10bit analog channel ‘A0′
  8. Figaro MOx sensor #1
  9. Figaro MOx sensor #2
  10. e2v MOx Ozone sensor
  11. e2v MOx NO2 sensor
  12. e2v MOx sensor #1
  13. e2v MOx sensor #2
  14. e2v MOx sensor #3
  15. e2v MOx sensor #4
  16. RHT03 Temperature
  17. RHT03 Relative Humidity
  18. BMP085 Temperature
  19. BMP085 Barometric Pressure
  20. GPS latitude coordinate
  21. GPS latitude North/South
  22. GPS longitude coordinate
  1. GPS longitude East/West
  2. Auxiliary 10bit ADC channel #1
  3. Auxiliary 10bit ADC channel #2
  4. Auxiliary 10bit ADC channel #3
  5. Auxiliary 10bit ADC channel #4
  6. Auxiliary 10bit ADC channel #5
  7. Auxiliary 10bit ADC channel #6
  8. Auxiliary 10bit ADC channel #7
  9. Auxiliary 10bit ADC channel #8
  10. On-board 18bit ADC channel #1
  11. On-board 18bit ADC channel #2
  12. On-board 18bit ADC channel #3
  13. On-board 18bit ADC channel #4
  14. QuadStat 18bit Auxiliary Electrode #1
  15. QuadStat 18bit Main Electrode #1
  16. QuadStat 18bit Auxiliary Electrode #2
  17. QuadStat 18bit Main Electrode #2
  18. QuadStat 18bit Auxiliary Electrode #3
  19. QuadStat 18bit Main Electrode #3
  20. QuadStat 18bit Auxiliary Electrode #4
  21. QuadStat 18bit Main Electrode #4

NOTES

  • if ‘AUX_10bit’, ‘ON_BOARD’ or ‘ALPHA_ARRAY’ are disabled in the firmware, ‘-999′ will be written in their place
  • All 10 bit values are integers between 0-1023 with a 5V reference. The measured analog voltage can be calculated as: Voltage=Value*(5/1023)
  • All 18bit differential values are in micro-volts. See the mcp3424 datasheet for information on voltage range and precision.
  • GPS coordinates are in NMEA-GLL format, thus of the form DDMM.MM == ‘DD’ degrees and ‘MM.MM’ minutes
  • GPS ‘N/S’ and ‘E/W’ tags (column 21 and 23) are translated to ’1/-1′ respectively
    • The UPOD will log raw data from whichever sensors are populated on the UPOD. Converting these data into concentrations can be a challenging task and depends very much on application. Please contact us if you would like information regarding methods for interpreting sensor outputs for the sensors used on the UPOD. Good publications also exist which discuss methods for post-processing data for various sensor types. upod snow 1