- 81: SODAR, Site METCRAX, Tue 24-Oct-2006 19:08:03 GMT,
Both Sodar data directories backed up today.
- 25: SODAR, Site METCRAX, Sun 08-Oct-2006 02:29:15 GMT, Sodar Repaired
SODAR REPAIRED.
Replace MPPA acoustic amplifier A4 (which had a blown power transistor).
Also checked speaker leads and found that pins CD 2,4 (which correspond
to loudspeakers 9 and 13/17 and amplifiers D3 and B4) were short-circuited.
Also speaker 6 (amplifier B2) is open-circuit and speaker set 2/21
(amplifier A1) measures 12 ohms instead of the 6 ohms a pair should.
Disconnected amplifier B4 and D3 from the short-circuited speakers.
Sodar-RASS now seems to be working, although there will be some loss in power
and perhaps a little distortion in the beams.
Ground around site is gradually drying out, still cannot drive to
to the sodar site and need to walk in from road.
- 21: SODAR, Site METCRAX, Sat 07-Oct-2006 00:44:58 GMT, Sodar - acoustic amplifier blown
The sodar is currently not operating.
It appears that one of the acoustic amplifiers on the sodar has blown.
The A4 unit power transistor has a corner broken off and one of the
speaker curcuits appears to be open-circuit.
Will attempt to repair the amplifier tomorrow, how fixing the speaker
will be harder.
The RASS unit appears to be fine, however without the acoustic unit
cannot collect any data.
Access to the sodar site is still tricky, hopefully the area will dry
out tonight and tomorrow. A grader driver made made a short access
driveway to the sodar site last week, however this blocked off the
drain along the road which resulted in a dam and may wash away our
access. Dug a drainage ditch which will hopefully prevent a washout.
- 20: SODAR, Site METCRAX, Fri 06-Oct-2006 20:29:12 GMT, Sodar down
Sodar appears to have gone down around 6 UT last night.
The surface group say that some of their sensors went down around
the same time and suspect there may have been a nearby lightning strike
with the storms that went through last night.
Power also down at sodar for generator service.
Sodar appeared to come up okay around 19UT, will recheck it if I can
this afternoon (however the access road to the sodar is cut-up with
the heavy rain so am having problems reaching the site).