Personal Ozone Monitor Manual Rev. E-2
9
Cell pressure = 608.1 torr (1 atm = 760 torr)
Photodiode Voltage = 1.2740 volts
Power Supply Voltage = 12.1 volts
Latitude = 4001.27765
Longitude = -10513.0308
Altitude = 1591.20 meters
GPS Quality = 1
Date = March 23, 2012
Time = 4:39:14 pm
If outputting logged data, the output serial data line will be preceded by the log
number; e.g.,
2893,3.2,307.4,608.1,1.2740,12.1,4001.27765,-10513.0308,1591.20,1,23/03/12,16:39:14
where 2893 is the log number.
In addition to data lines, messages are written to the serial port when logging is begun
or ended, when transmission of data from the logger is begun and ended, when data
collection is interrupted (e.g., due to a power failure), and when the averaging time is
changed.
4.
GPS
The POM contains an on-board GPS unit that incorporates the well-known u-blox 6
GPS position engine and an efficient antenna system to provide highly accurate and
precise location data with each ozone measurement.
To acquire satellite signals, go outdoors away from tall buildings and trees. Acquiring
satellite signals may take 1-5 minutes. For best results, stand still in an open area
with the POM powered on until an asterisk appears on the LCD as shown below. The
asterisk
denotes a valid satellite connection:
* O3= 2.7 ppb
T=305.4 P=682.3
As described in Section 5.13 (
“Viewing GPS Coordinates via the Front Panel”) below,
it is possible to view the GPS data in real time on the LCD by navigating to the GPS
submenu. GPS coordinates, along with the GPS quality indication are also logged
with each measurement when the POM is set to log. The
GPS quality indication
can
be translated as:
0 = Fix not available
1 = Non-differential GPS fix available
2 = Differential GPS (WAAS) fix available
6 = Estimated.
