Entry
| Date
| Title
| Site
| Author
| #Graphics
|
314 | Sun 20-Aug-2006 | site visit to 10, cabling for pyg | 10 | semmer
|
306 | Sat 19-Aug-2006 | Station visit, site 10, August 19 | 10 | ideris
|
293 | Wed 16-Aug-2006 | Site tour, stn 10 yesterday | 10 | oncley
|
279 | Sat 12-Aug-2006 | Soil sample at site 10 | 10 | oncley
|
267 | Sat 12-Aug-2006 | Cleaned radiometers | 10 | ideris
|
266 | Sat 12-Aug-2006 | TRIME and Gravimetric Measurements | 10 | ideris
|
265 | Sat 12-Aug-2006 | Cleaned Kh2o | 10 | ideris
|
264 | Sat 12-Aug-2006 | Station visit. Site 10, August 12 | 10 | ideris
|
242 | Tue 08-Aug-2006 | Station visit, site 10, Aug 8 | 10 | maclean
|
230 | Sat 05-Aug-2006 | krypton klean | 10 | oncley
|
229 | Sat 05-Aug-2006 | rads cleaned | 10 | oncley
|
228 | Sat 05-Aug-2006 | Soil sample at site 10 | 10 | oncley
|
227 | Sat 05-Aug-2006 | rain gauge test | 10 | oncley
|
226 | Sat 05-Aug-2006 | Station visit to site 10, 5 Aug | 10 | oncley
|
200 | Sat 29-Jul-2006 | Station visit, site 10: soil moisture | 10 | horst
|
199 | Sat 29-Jul-2006 | Station visit, site 10: rain gauge | 10 | horst
|
198 | Sat 29-Jul-2006 | Station visit, site 10: USB disk | 10 | horst
|
197 | Sat 29-Jul-2006 | Station visit, site 10, July 29 | 10 | horst
|
168 | Tue 25-Jul-2006 | Station 2 site visit | 10 | maclean
|
166 | Mon 24-Jul-2006 | Station 10 radiometers | 10 | maclean
|
165 | Mon 24-Jul-2006 | Station 10 soil sample | 10 | maclean
|
164 | Mon 24-Jul-2006 | Station 10 Krypton cleaning | 10 | maclean
|
163 | Mon 24-Jul-2006 | Station 10 site visit | 10 | maclean
|
134 | Tue 18-Jul-2006 | St 10 Visit: radiometers cleaned | 10 | militzer
|
133 | Tue 18-Jul-2006 | St 10 Visit: krypton cleaning | 10 | militzer
|
130 | Mon 17-Jul-2006 | St 10 Visit: routine maintenance | 10 | militzer
|
129 | Mon 17-Jul-2006 | St 10 Visit: Soil sample | 10 | militzer
|
111 | Fri 14-Jul-2006 | St 10: flux Serial numbers | 10 | militzer
|
103 | Fri 14-Jul-2006 | St 10: Radiation stand raised to full extension (~3m) | 10 | poulos
|
102 | Fri 14-Jul-2006 | St 10 Soil samples/info | 10 | poulos
|
92 | Thu 13-Jul-2006 | St 10: Radiation - elevated values of LW.in | 10 | poulos
|
91 | Thu 13-Jul-2006 | st10 Visit: Logger Cabled Directly to Viper | 10 | militzer
|
89 | Wed 12-Jul-2006 | Low voltage krypton at Stn 10 versus Stn 3 spectra | 10 | poulos
|
85 | Mon 10-Jul-2006 | st10 Visit: HFT swapped back: Boost XBEE radio power | 10 | militzer
|
81 | Mon 9-Jul-2006 | st10 Visit: HFT swapped | 10 | militzer
|
78 | Sat 08-Jul-2006 | st 10 NNW: Data drive exchanged | 10 | poulos
|
72 | Fri 07-Jul-2006 | st10 Visit: domes cleaned, descrepancy between Tsfc temps | 10 | militzer
|
71 | Fri 07-Jul-2006 | st10 Visit: new software | 10 | militzer
|
70 | Fri 07-Jul-2006 | Radiation in question at Station 10, NNW | 10 | poulos
|
38 | Tue 04-Jul-2006 | st10 HFT, gsoil | 10 | militzer
|
37 | Tue 04-Jul-2006 | st10 Visit: krypton, mast down | 10 | militzer
|
22 | Sun 02-Jul-2006 | cupido.xml updated, Site 10 | 10 | poulos
|
21 | Sun 02-Jul-2006 | Krypton cleaning Site 10 - very low voltage values | 10 | poulos
|
20 | Sun 02-Jul-2006 | TRIME soil moisture Site 10 | 10 | poulos
|
19 | Sun 02-Jul-2006 | Site 10 weepholes drilled | 10 | poulos
|
18 | Sun 02-Jul-2006 | Site 10 (NNW) boom angles | 10 | poulos
|
- 314: radiation, Site 10, Sun 20-Aug-2006 14:55:58 MST, site visit to 10, cabling for pyg
I went to site 10 to beep out the cabling for the Eppley PYG to the CR10X.
We need to make more cables for METCRAX. I had to disconnect the pyg
instruments for a short period. This event took place around 11:00 to
11:30 local time.
- 306: LOG, Site 10, Sat 19-Aug-2006 16:40:20 MST, Station visit, site 10, August 19
A.J.I. and Steve S. arrived 20:15 and left at ~20:45
Activities:
- went to investigate hightened Tsfc compared Tsfc.pyrg, determined that the
sensor was facing a huge dead spot of sand while the rest of area is pretty
well vegetated. So its seems ok.
- Downloaded program from datalogger which shut operations of logger from 13:21-
13:40
- Re-routed electric fence wire just to the top wire, it appears as though the
bottom wire was shorted due to vegetation growth.
- 293: LOG, Site 10, Wed 16-Aug-2006 09:16:49 MST, Site tour, stn 10 yesterday
Gave a tour of site 10 to Constance Brown (Indiana Univ.), Karyn Sawyer, and
Jose Meitin yseterday. Grabbed the USB data as long as I was there, but no
other service. Everything seemed okay. On site about 11:00-11:40.
- 279: soil, Site 10, Sat 12-Aug-2006 17:33:15 MST, Soil sample at site 10
0920 MST, 8/12
Trime: 6.7 (stomped a little), 7.8,7.7,7.6% (stomped more)
Took soil sample, tub#2 0-3 cm, tub#2 3-6 cm,
and rubbermaid tub labeled "stn2" was used for 6-8cm.
0-3 cm net weight in tupperware = 134.7 g - 46.2 g = 88.5 g <- use to process
net weight in Al foil tray = 88.4 g
net dry weight in Al foil tray = 80.1 g
3-6 cm net weight in tupperware = 139.3 g - 45.9 g = 93.4 g <-
net weight in Al foil tray = 93.3 g
net dry weight in Al foil tray = 88.1 g
6-8 cm net weight in tupperware = 103.3 g - 43.3 g = 60.0 g
net weight in Al foil tray = 60.0 g
net dry weight in Al foil tray = 56.7 g
- 267: radiation, Site 10, Sat 12-Aug-2006 17:08:20 MST, Cleaned radiometers
Cleaned radiometer from 9:25-9:32
- 266: soil, Site 10, Sat 12-Aug-2006 17:03:12 MST, TRIME and Gravimetric Measurements
TRIME measurement probe in at 9:15, then measurement done at 9:20 and readings
as follows:
1st: 6.7%, TDR=56
2nd: 7.6%, TDR=? (after stomp of soil)
3rd: 7.7%, TDR=55
4th: 7.6%, TDR=55
-Gravimetric measurement at 9:25
- 265: krypton, Site 10, Sat 12-Aug-2006 17:00:34 MST, Cleaned Kh2o
- Cleaned Kh2o at 9:00, voltage went from .02 to .04 (first time), and then up
to .05 after the second cleaning, finished cleaning at 9:03 MST.
- 264: LOG, Site 10, Sat 12-Aug-2006 16:49:45 MST, Station visit. Site 10, August 12
A.J.I. and Steve O. arrived at 8:40 MST and left at 9:45 MST:
Activities:
- Mast lowered at 8:47-9:09
- Cleaned Kh2o at 9:00, voltage went from .02 to .04 (first time), and then up
to .05 after the second cleaning, finished cleaning at 9:03 MST.
- TRIME measurement probe in at 9:15, then measuremnt done at ~9:20 with
readings as follows:
1st: 6.7%, TDR=56
2nd: 7.6%, TDR=? (After Stomp of soil)
3rd: 7.7%, TDR=55
4th: 7.6%, TDR=55
- Gravimetric measurements at 9:25 MST
- Cleaned radiometers at 9:25-9:32
- 242: power, Site 10, Tue 08-Aug-2006 15:10:47 MST, Station visit, site 10, Aug 8
Visited site, giving a tour for Susanne Grossman-Clarke of ASU.
While lifting charge controller out of battery box to inspect,
the load circuit connector was bent up, almost breaking its
connections to the board. Shut down power and pushed connector
back down on the board. Station is operating, but this
controller board should be replaced and inspected.
- 230: krypton, Site 10, Sat 05-Aug-2006 19:20:11 MST, krypton klean
krypton cleaned at about 0030Z. Mast down 0024-0034. Voltage increased from
0.07 to 0.19V. (I think this is a record for this sensor??)
- 229: radiation, Site 10, Sat 05-Aug-2006 19:19:22 MST, rads cleaned
Radiometers cleaned 0011-0014Z. There was light dust on pyg.in.
- 228: soil, Site 10, Sat 05-Aug-2006 19:16:37 MST, Soil sample at site 10
1750 MST, 8/5
Trime:
moisure 11.2 (all 3 readings)
Took soil sample, tub#2 0-3 cm, tub#2 3-6 cm,
and rubbermaid tub labeled "stn2" was used for 6-8cm.
0-3 cm net weight in tupperware = 147.0 g - 46.1 g = 100.9 g
net weight in Al foil tray = 100.9 g
net dry weight in Al foil tray = 94.3 g
3-6 cm net weight in tupperware = 159.8 g - 46.0 g = 113.8 g
net weight in Al foil tray = 113.6 g
net dry weight in Al foil tray = 106.3 g
6-8 cm net weight in tupperware = 120.6 g - 43.1 g = 77.5 g
net weight in Al foil tray = 77.4 g
net dry weight in Al foil tray = 72.4 g
- 227: rain, Site 10, Sat 05-Aug-2006 19:15:43 MST, rain gauge test
Did 2 test tips at 0017 Z.
- 226: LOG, Site 10, Sat 05-Aug-2006 19:10:02 MST, Station visit to site 10, 5 Aug
I just came back from a solo visit to 10 from ~1700-1750 (there was time both
before and after hauling stuff up and down the hill).
Actions:
- check fence -- seemed fine
- take photos
- swap USB
- upgrade software
- check "ntpq -p" -- gave -52 offset, 84 jitter for *GPS
- clean radiometers
- test rain gauge
- klean krypton (mast down 1725, up 1734)
- take TRIME and gravimetric sample
- tighten CR10 screws
- 200: soil, Site 10, Sat 29-Jul-2006 16:47:01 MST, Station visit, site 10: soil moisture
Trime reading at 1457 MST:
21.7% moisture 28.0
22.9% moisture 29.0
23.1% moisture 29.0
23.2% moisture 28.0
22.8% moisture 28.0
23.0% moisture 28.0
23.0% moisture 28.0
23.1% moisture 28.0
23.1% moisture 28.0
23.3% moisture 28.0
23.2% moisture 28.0
23.3% moisture 28.0
23.1% moisture 28.0
Gravimetric sample had voids in soil (4 tries), so samples not good
for bulk density. On second thought, I may have been resampling a
previously disturbed area, so take data with caution.
0-3 cm net weight in tupperware = 86.0 g - 46.2 g = 39.8 g
net weight in Al foil tray = 39.3 g
3-6 cm net weight in tupperware = 164.8 g - 46.5 g = 118.3 g
net weight in Al foil tray = 118.2 g
- 199: rain, Site 10, Sat 29-Jul-2006 16:44:57 MST, Station visit, site 10: rain gauge
Found rain gauge tube clogged; plastic funned filled and dripping into
gauge. Removed plastic tab, cleaned tube and re-assembled.
Tripped rain gauge at 1455 MST
- 198: data-system, Site 10, Sat 29-Jul-2006 16:43:27 MST, Station visit, site 10: USB disk
Swapped USB disk. Checked data from logger, TRH, prop-vane, barometer.
- 197: LOG, Site 10, Sat 29-Jul-2006 16:40:56 MST, Station visit, site 10, July 29
Arrived site 10, 1420 MST, July 29
Upper fence wire off SE stake, repaired; fence tested okay
Swapped USB disk, cleaned rain gauge tube, took soil samples, cleaned
radiometers
Departed 1540
- 168: LOG, Site 10, Tue 25-Jul-2006 07:19:07 MDT, Station 2 site visit
Arrived 15:08 MST
Krypton voltage at 615 mV. Decided a cleaning wasn't necessary.
Radiometers clean and net radiometer level.
Swapped usbdisk.
Taped lid of GOES cooler.
Inspected and tipped rain gauge.
Sampled soil, see next entry.
Left 15:55 MST
- 166: radiation, Site 10, Mon 24-Jul-2006 22:58:25 MDT, Station 10 radiometers
Radiometers looked clean at site 10.
Leveled net radiometer.
Assuming net rad boom was pointing south,
bubble was NE of center, so radiometer
was pointing slightly SW.
- 165: soil, Site 10, Mon 24-Jul-2006 22:58:25 MDT, Station 10 soil sample
Trime was not charged, so no trime sample.
Took 0-3 cm sample, in tub "#2, 0-3". Other samples
failed, soil too loose.
Tupperware lid came loose, so moisture not valid
net "wet" soil = Sample - tupperware = 123.9 - 46.1 = 77.8 gm
net "wet" soil in foil tray = 77.9 gm
net dry soil = 77.3 gm
- 164: krypton, Site 10, Mon 24-Jul-2006 22:55:03 MDT, Station 10 Krypton cleaning
Lower mast at 11:03 MST
Cleaned krypton with distilled water and Qtip:
Krypton voltage:
before cleaning: 130 mV
after cleaning: 95 mV
slowly rose to 100 mV
Voltage dropped after cleaning.
Raised mast: 11:22 MST
- 163: LOG, Site 10, Mon 24-Jul-2006 22:45:01 MDT, Station 10 site visit
Arrived 10:50 MST
Cover was off the electric fencer. Weighted it with rock. Cows nearby.
Taped lid on GOES cooler.
11:15 lowered mast, cleaned krypton (see next entry), raised mast at
11:23 MST.
Radiometers looked clean. Re-leveled Rnet.
Swapped USB disk.
Attempted to take soil sample - soil very loose, only succeeded
in 0-3cm sample, in tub #2.
Trime unit was discharged. Have to some back.
Left 12:30 MST
- 134: radiation, Site 10, Tue 18-Jul-2006 09:55:10 MDT, St 10 Visit: radiometers cleaned
17jul06 12:40 - 14:50
Purpose: routine maintenance, logger power
Radiometers Cleaned 14:30
Logger Power re-arranged.
Had to rewire to allow the logger to be powered directly from the
main data system since we turned off the XBEE radios a couple days
ago and disconnected the pv as a result.
This box needs to be rewired anyway.
Retrieved XBEE radios
Removed 20w pv from top of sawhorse; which slightly improved the
shading issue of the ground produced by the sawhorse/logger.
- 133: krypton, Site 10, Tue 18-Jul-2006 09:43:22 MDT, St 10 Visit: krypton cleaning
17jul06 12:40 - 14:50
Purpose: routine maintenance, logger power
Mast Down: 12:52-13:50
Krypton Cleaned: s/n 1101
This *^(^ thing fooled me.
I ended up cleaning it 4 times over and hour period
because when doing data dump prior
to cleaning it i thought i'd seen 200mV. Then after the first
and subsequent cleanings it went to between 100-130mV which made
me think it got worse and been messed up.
Wrong, Greg later informed me the pre-clean values had been ~20mV.
According to Greg's analysis this unit is performing well across
the spectrum to at up to ~14hz, however we may want to swap it
out with the kh2o at 5 where the licor is colocated.
- 130: project-info, Site 10, Mon 17-Jul-2006 16:21:23 MDT, St 10 Visit: routine maintenance
17jul06 12:40 - 14:50
Purpose: routine maintenance, logger power
Mast Down: 12:52-13:50
USB local data storage swapped/recovered
GOES pvc elbows installed and raised off ground to help ventillation
See also clean kh2o/rad
- 129: soil, Site 10, Mon 17-Jul-2006 16:21:02 MDT, St 10 Visit: Soil sample
17jul06 12:20 - 14:50
Grabbed tub of soil. This completes the tub soiling for Cupido. Now Dr.O
will have plenty of dirt to play with back in Boulder!
- 111: project-info, Site 10, Fri 14-Jul-2006 20:33:07 MDT, St 10: flux Serial numbers
TP01 200240
Pyr.in ep161945
Pyr.out ep16107
HFT H983213
Tsoil STP94017
Pyg.out ep27907
Pyg.in ep29136
NetRad Q91096
ie radiometers all originally as planned and soils had been swapped from st5.
confirmed coefficients in logger per what SteveS sent
- 103: radiation, Site 10, Fri 14-Jul-2006 19:47:01 MDT, St 10: Radiation stand raised to full extension (~3m)
The radiation stand was raised between 1105 and 1150 LT.
The purpose of this was to eliminate some potential impacts of radiation from
bushes above the height of the LW.in sensor.
Initial impressions are that this had little effect. The hillside/valley location to the west may be the culprit, as may be a scratch on the sensor dome.
Greg
- 102: soil, Site 10, Fri 14-Jul-2006 19:44:03 MDT, St 10 Soil samples/info
time: 1105-1239pm
TRIME measurement 9.7%
Gravimetric measurements for 0-3cm and 3-6cm (it took 20 tries and 3 insertions
to get the two samples because of rocks and soil falling out of the core.
Gravimetric results (g):
Layer Sample Weight
Cntr wt in cntr
0-3cm 43.0 150.5
3-6cm 44.3 172.3
To the oven
All tin weights were 1.5g and are NOT included (tared)
0-3cm by tin
Before After
Cookng Cooking Difference
C1 32.9 32.7 -0.2
C2 36.6 36.3 -0.3
F2 35.3 35.0 -0.3
3-6cm by tin (E1-E3)
F3 35.5 34.7 -0.8
A2 25.5 24.9 -0.6
A3 40.9 40.0 -0.9
- 92: radiation, Site 10, Thu 13-Jul-2006 16:00:43 MDT, St 10: Radiation - elevated values of LW.in
Site 10 LW.in has seemed elevated relative to the other stations (~20 W/m2 most
of the day). There appears to be two main possible reasons.
1. The 4-component radiation stand is within 3 m of some vegetation (bushes)
that project somewhat into the hemisphere.
2. There is a 1 cm long and < 1mm wide scratch on the dome.
Tomorrow morning we will test #1 by elevating the radiation sensor another
meter (max height) and observing the resulting changes in the radiation
measurements.
Pictures were taken of its current configuration and of the scratch.
Measurements can be considered disturbed (radiation primarily) 0938-1030LT.
There was a false rain spike during the visit.
HFT,jm: added direct cabling bypassing the Xbee Radios.....next morning no more
glitches in the data plots.
Thus confirmation that the XBEE radios are vulnerable to the dropped
characters as we knew and expected. Find reason later.....
- 91: soil, Site 10, Thu 13-Jul-2006 12:29:39 MDT, st10 Visit: Logger Cabled Directly to Viper
13Jul06 9:30-10:30
Purpose: Swap logger to direct cabling to see if that will eliminate
the HFT glitches produced by character loss in the data
message.....done.
Note: This 'rf logger box' is wired such that the +v input can only go
through the solar charger. This means it must run off the internal
battery and that battery must now be charged through the viper front
panel...this could be an issue for 'blowing it's fuse' and it'll be
interesting to find out.
Goes: box elevated slightly off ground. This box needs to be
redrilled for drain holes since it wasn't correct.
- 89: krypton, Site 10, Wed 12-Jul-2006 18:47:01 MDT, Low voltage krypton at Stn 10 versus Stn 3 spectra
The spectra were created via data_dump, scan etc.. We find that the spectra look close to -5/3 to 15Hz at Site 10 and all the way to 30Hz at Site 3 (operating at 60Hz). As a result we believe the low V krypton data is OK at Site 10, subject to further analysis.
- 85: soil, Site 10, Mon 10-Jul-2006 20:09:46 MDT, st10 Visit: HFT swapped back: Boost XBEE radio power
10Jul06 16:00-17:30
Purpose: HFT has been glitching at night despite swapping in a replacement
yesterday.
Examination of data revealed that the data messages from the logger are
being messed up by having characters dropped around the hft values.
This results in erroneous data being calculated in the averages.
Speculation that the maxstream radios may be 'burping' at night in
different radio propagation conditions, or lower batt voltage...hmmm.
1) Xbee radios here. Cabling looks good. But there are significant
bushes between the radio and receiver on the mast, plus that radio is in
the middle of the tripod with some 'shading' or reflective surfaces
from the tubing of the tower.
2) Boosted transmit power level from 'medium' (2), to 'highest' (4)
for the 2.4 radios
- 81: soil, Site 10, Mon 9-Jul-2006 20:03:55 MDT, st10 Visit: HFT swapped
9Jul06 11:45-12:15
Purpose: HFT has been glitching at night
New sensors received from Boulder last night.
Disconnected, but left installed in soil: H983213
Installed H983211
Verified via rserial data consistency.
- 78: data-system, Site 10, Sat 08-Jul-2006 17:21:36 MDT, st 10 NNW: Data drive exchanged
The data USB drive was exchanged at NNW (10) this morning at approximately 1130am LT.
- 72: radiation, Site 10, Fri 07-Jul-2006 15:46:14 MDT, st10 Visit: domes cleaned, descrepancy between Tsfc temps
7Jul06 12:05-12:40
Purpose: Cleaned radiometer domes with distilled h2o. There were some
dirt splatters on the downward looking domes. We did this because of
unusual discrepancies between the long-wave radiometer calculated surface temp. and the directly measured Tsfc values. We had observed positive effects of cleaning the 'splattered' rnet dome at st7,st8.
This discrepancy began with the big rain event on the 6th, 0Z. That
event left roughly 2' of silt in the wash near st8 and may have
included hail. It's possible water got into the sensor/cabling,
thermister damage, dirt on the domes, etc.
We're continuing to investigating this issue.
- 71: data-system, Site 10, Fri 07-Jul-2006 15:44:47 MDT, st10 Visit: new software
7Jul06 12:05-12:40
Purpose: installed new software
see next log entry
- 70: radiation, Site 10, Fri 07-Jul-2006 09:55:03 MDT, Radiation in question at Station 10, NNW
The long, short and net radiation sensors at Site 10 have begun to deviate from their behavior previously. Specifically, the value of LW radiation (in, out) is large and the range of Tsfc is muted. Less noticeable, SW radiation is reduced. We have noted that during heavy monsoon rains that dirt can splatter the domes, preferentially the lower dome.
- 38: soil, Site 10, Tue 04-Jul-2006 22:05:07 MDT, st10 HFT, gsoil
4jul06 14:00
Examined hft, nothing unusual in wiring that i can tell although resistor inside cable could be issue. Symptom is glitching at night when the flux goes positive....Still happening.
May need to replace the hft.
- 37: krypton, Site 10, Tue 04-Jul-2006 22:01:37 MDT, st10 Visit: krypton, mast down
4jul06 14:00
Mast Down 14:30 - 16:00
Tried to find cause of low kh20 voltages but really didn't. Actual voltage going into serializer was 40mV....yuk. Need to return with a different krypton and a better way to test the voltage output. Power to the krypton was good.
Cleaned krypton and got some improvement.
Path length appears roughly 10mm....perhaps too wide given the moist for Arizona conditions?
- 22: data-system, Site 10, Sun 02-Jul-2006 22:19:45 MDT, cupido.xml updated, Site 10
The most recent version of cupido.xml was copied to the Viper at Site 10. The new C++ GOES code will be inserted during the next visit.
- 21: krypton, Site 10, Sun 02-Jul-2006 22:17:44 MDT, Krypton cleaning Site 10 - very low voltage values
This krypton is reading very low voltages (under 0.1 V). Thus it was cleaned and voltage values were not improved. This sensor may be fading.
- 20: soil, Site 10, Sun 02-Jul-2006 22:14:29 MDT, TRIME soil moisture Site 10
A six-point average of TRIME soil moisture at Site indicated 8.7%. The station is reading about 12% from the echo probe, which is about 4-5 times higher than the other three flux sites. Thus, this measurement corroborates a relatively high value. No other TRIME measurements have been taken.
- 19: data-system, Site 10, Sun 02-Jul-2006 22:13:23 MDT, Site 10 weepholes drilled
Weepholes were drilled today (corners of bottom plate).
- 18: sonic, Site 10, Sun 02-Jul-2006 22:04:28 MDT, Site 10 (NNW) boom angles
RM Young boom angle: 300 degrees
Sonic boom angle = 208 degrees