Vaisala RS41 - Manual (Page 23)

Chapter 3 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 21
Checking RS41 LED Light
After preparing radiosonde RS41 for the sounding, check the
radiosonde GPS reception by checking the LED light on the radiosonde
cover. RS41 LED light will switch off automatically after the launch.
Table 4 RS41 LED Lights
Green LED is blinking. When the green LED light is blinking,
the reconditioning of the humidity
sensor and sensor checks are in
progress and/or GPS signal has not
been detected after the radiosonde
startup. To receive the GPS signal,
take the radiosonde outside with line
of sight to GPS satellites.
Green LED is lit and burns steadily. 1. The radiosonde is ready and
works fine, determined by the
radiosonde self diagnostics.
The self diagnostics cover, for
example, temperature and humidity
sensors, as well as GPS.
2. GPS satellites are detected. Once
GPS signal has been found after
radiosonde start up, the LED light
becomes steady green. The LED
stays steady green despite possible
GPS blind spots (for example, inside
the balloon shelter), indicating that
the GPS feature has been diagnosed
to be OK.
3. The steady green LED light
indicates that the telemetry from
RS41 is working.
Red LED is lit. Error. For possible battery
replacement, see Appendix A
Replacing Radiosonde Batteries on
page 33
.
NOTE Even though the radiosonde LED light is steady green and the
telemetry is working, it does not necessarily indicate that MW41
sounding software receives data from the radiosonde. Always make
sure that the sounding software receives the data.