...
Note Aug14 ~9:30-10:30PDT, I JohnM decided to take a 'shot' myself. These are in column 'U8-14. The differences with Steves are in 'UD8-14 '. When I took these, it was further away than I'd tried before (well beyond the berm), and nominally I had the horizontal reference of the datascope on the horizon with the sonic still in view at the top...ie tried to minimize the tilt angle as best i could. I aligned visually using symmetry between the 'left-right' probes balanced on either side of the square box. I only did the upwind at this time because later on the winds were good and I didn't want to mess them up. From these readings, difference was substantial but consistent with Steve's.....may need to 'cal?' I'm hoping KK will be able to do a few proper theadolite sun-angle shots tomorrow.
Note: Aug15. Sun-Angle Sanity Check:
Kurt, Chris and I took sunangle method shots of 2 sonics to compare with the data-scope readings. We aligned the theadolite to the sun for 36:01.27N, 119:53.59W and using the sunangle program obtained the offset angle. The magnetic declination for this latitude/date = 13.6. From the sun angle readings: U6 = 144.:49:06 ~ 144.8deg true - 13.6 = 131.2 magnetic; U11 = 148:19:50 ~ 148.3deg true - 13.6 = 134.7 magnetic. NOTICE that these magnetic readings for U7, U11 match SteveO's within about .5deg, but mine don't match. Conclusion: Use Steve's readings.....
| upwind | U8-14 | UD8-14 | bottom | top |
---|---|---|---|---|---|
1 |
|
|
| 131.0 | |
2 |
|
|
| 132.9 |
|
3 | 135.1 | 141.0 | 5.9 | 131.9 | 134.7 |
4 | 133.4 | 140.1 | 6.7 | 132.7 | 132.5 |
5 | 132.7 | 139.3 | 6.6 | 131.5 | 132.7 |
6 | 131.6 | 138.5 | 6.9 | 131.8 | 131.5 |
7 | 131.3 | 138.4 | 7.1 | 132.4 | 132.2 |
8 | 129.9 | 136.3 | 6.4 | 132.1 | 132.2 |
9 | 135.7 | 141.6 | 5.9 | 131.6 | 132.9 |
10 | 135.9 | 141.8 | 5.9 | 132.6 | 134.6 |
11 | 135.3 | 141.2 | 5.9 | 132.3 | 130.2 |
12 |
|
|
| 132.9 |
|
13 |
|
|
| 131.5 |
|
...