- 26: RADAR, Site trademark, Tue 05-Mar-2002 17:51:23 GMT, RARAR Data lost 00-1730 Z March 5
The profiler PC rebooted itself around 1730 (9:30am) while I was
drilling new holes for reflectors. The SPC files was lost so no data
will be available from 0000-1730 Z March 5. Except the serial moments
should be ok.
- 12: RADAR, Site trademark, Fri 01-Mar-2002 12:27:17 GMT, RARAR PARAMETERS: DISCUSSION
UPDATE: 05 Mar 2002: Created an additiona PAR file: rno_r2. This may be
a better rain mode for melting layer study. The RNO_M PAR file was
modified to do MEAN spectral averaging instead of ICRA. Then there is
enough dsp memory to sample 82 ranges up to 5.0 km. So we can see the
melting layer with 60 m resolution and see higher. Only compromise is
if birds are present.
So TWO PRIMARY MODES ARE RNO_I in inversion/clear weather and
RNO_R2 for rain, melting layer, or fronts (with rain) study.
(END UPDATE).
WASHOE LAKE:
------------
Because the clutter is worse in yvery and y-sou, we are using 3-beam sets
(xvert, x+eas, y+nor). Also, I set up a RASS consensus time of 7 minutes
to get better temperature profiles.
TRADEMARK DRIVE
---------------
At this site there is a lot of clutter in all beams. I am using a 3-beam
sequence mostly for consistency with the Washoe Lake site.
rno_r rain mode
rno_m melting layer mode
rno_f fronts mode
rno_i inversion mode
rno_c chinook mode
rno_t test mode
rno_tr test RASS mode
We should try using melting layer mode in mose rain situations. and inversion
mode in most clear air situations. The test modes should be run occasionally
(once each week?) to check that beam switching is working well.
If second trip echoes are seen while in melting layer mode, then consider
changing to rain mode. If the winds are noisy while in melting layer or rain
mode, then consider changing to fronts mode.
If the winds are aliased while in inversion mode, the consider switching
to chinook mode.
BUT changes should be kept to a minimum because it will cause NIMA to crash
for that day.
- 11: RADAR, Site washoelake, Fri 01-Mar-2002 12:20:52 GMT, RARAR PARAMETERS: WASHOE LAKE
I have set up several parameter files for different weather. See discussion
in seperate radar log entry.
For all parameter files:
LAT: 39.25 N
LON: 119.81 W
ALT: 1566 m
ID Code: 502 (ISS2)
BEAMS:
NAME AZ ZEN CODE CLUTTER ON 02-22-2002 (Friday)
yvert 13 0 22 a lot of clutter to far ranges
xvert 103 0 21 fairly clean
y+nor 13 21 38 light clutter to 700 m
y-sou 193 21 26 a lot of clutter to far ranges
x+eas 103 21 25 light clutter to 500 m
x-wes 283 21 37 light clutter to 500 m
Conclusion is to use: yxert. x+. y+ in 3 beam sequence.
RXBW DELAY (ns)
CLKPER: 100 ns 400 1000
PRETR: 2000 700 1100
POSTTR 0 1700 1700
PREBLNK: 2000 3300 2000
POSTBK: 600
SYNC: 200
RASS USES 2048 pts; parameter set 4;
Air signal: -9.2 to 9.2 m/s
T signal: -15C to 25C (change to -20C on 01-Mar)
acoustic: -18C to 28C (change to -23C on 01-Mar)
RASS CNS time is 7 min (55%; 2.0 m/s); don't subtract clear air.
RASS PAR SET #4
---------------
IPP 20
PW 400
NCODE 0
NHTS 25
DELAY 1800
SPACE 400
NCI 10
NSPEC 24
NFFT 2048
SCALE 409.6
DWELL 30
HT L 0.12
HT H 1.56
IPP 2.68
PULSE 60
PARAMETER FILES
---------------
rno_t test - cycle through all beams; no RASS
rno_tr test RASS - continuous RASS
rno_r rain mode - high altitude, 50% vertical dwells; wide Nyquist
rno_c chinook mode (high winds) - 60 m resolution, large Nyquist, short IPP.
rno_i inversion mode - short IPP, 60 m resolution, 30 min cns; 50% vertical
rno_m melting layer mode - 50% vertical, 60 m, wide Nyquist
rno_f fronts mode - long IPP, wide Nyquist.
(see PAR files for details).
- 10: RADAR, Site trademark, Fri 01-Mar-2002 11:56:37 GMT, RARAR PARAMETERS: TRADEMARK DRIVE
I have set up several parameter files for different weather. See discussion
in seperate radar log entry.
For all parameter files:
LAT: 39.45 N
LON: 119.74 W
ALT: 1351 m
ID Code: 503 (ISS3)
NOTE: Bean names do not match directions because of change (fix) in
directions in Feb 25 (before project begins). Winds should be correct
after 20Z on Feb 25.
BEAMS:
NAME AZ ZEN CODE CLUTTER ON 02-24-2002 (Sunday)
(calm surface wind conditions)
yvert 175 0 22 clutter on scope to 1 km, but data look ok.
xvert 265 0 21 similar to yvert. but stronger clutter and spurs
y+wes 175 21 38 clutter in lowest 700 m
y-eas 355 21 26 similar to y+
x+nor 265 21 25 strong clutter to 800 m; strong spurs
x-sou 85 21 37 similar to x+
The noise level on the scope will "pulse" frequently, raising the noise
level of the spectra. This maybe because of the cell tower nearby.
Checking clutter a little later (Feb 24) with surface winds about 4 m/s:
Looks like yvery has slightly less clutter than xvert.
y+ and y- about the same, y- maybe a touch less so use it in 3-beam sequence.
x+ and x-: x- is just slightly better, but still all have a lot of clutter.
Conclusion is to use: yvery. x-. y- in 3 beam sequence.
RXBW DELAY (ns)
CLKPER: 100 ns 400 1000
PRETR: 2000 700 1100
POSTTR 0 1700 1700
PREBLNK: 2000 3300 2000
POSTBK: 600
SYNC: 200
RASS USES 2048 pts; parameter set 4;
Air signal: -9.2 to 9.2 m/s
T signal: -15C to 25C (change to -20C on 01-Mar)
acoustic: -18C to 28C (change to -23C on 01-Mar)
RASS CNS time is 7 min (55%; 2.0 m/s); don't subtract clear air.
RASS PAR SET #4
---------------
IPP 20
PW 400
NCODE 0
DELAY 1800
SPACE 400
NCI 10
NSPEC 24
NFFT 2048
SCALE 409.6
DWELL 30
HT L 0.12
HT H 1.56
IPP 2.79
PULSE 60
PARAMETER FILES
---------------
rno_t test - cycle through all beams; no RASS
rno_tr test RASS - continuous RASS
rno_r rain mode - high altitude, 50% vertical dwells; wide Nyquist
rno_c chinook mode (high winds) - 60 m resolution, large Nyquist, short IPP.
rno_i inversion mode - short IPP, 60 m resolution, 30 min cns; 50% vertical
rno_m melting layer mode - 50% vertical, 60 m, wide Nyquist
rno_f fronts mode - long IPP, wide Nyquist.
(se PAR files for details).