Central California Ozone Study (CCOS) - Desert Research Institute

CCOS Field Operations Plan Version 2: 5/31/00
MSL down to lowest permissible safe altitude (expected to be ~500 ft AGL) at the Angiola
tower.
Table 2.6-12. Fresno area afternoon flight with circuits above and within mixed layer.
WP W Longitude N Latitude Distance Time Spirals
Location DD MM DD MM kilometers naut. miles (minutes) (min)
0 Fresno (FAT) 119 42 36 47
First circuit - above mixed layer 108.6 58.6 18.1
1 Los Banos (Santa Nella) 120 52 37 4
44.4 24.0 7.4
2 Turlock 120 51 37 28
30.1 16.2 5.0
3 Turlock Lake (turn) 120 34 37 37
47.0 25.3 7.8
4 Mariposa-Yosemite 120 3 37 31
97.3 52.5 16.2
5 Harris River (MKR) 119 27 36 47
91.8 49.5 15.3
6 Harris Ranch 120 14 36 15
103.1 55.6 17.2
7 S#1 Angiola tower 119 32 35 56 20
94.6 51.1 15.8
8 Woodlake 119 6 36 24
52.8 28.5 8.8
5 Harris River (MKR) 119 27 36 47
Second circuit - in the mixed layer 154.8 83.5 25.8
4 Mariposa-Yosemite 120 3 37 31
97.3 52.5 16.2
5 Harris River (MKR) 119 27 36 47
91.8 49.5 15.3
6 Harris Ranch 120 14 36 15
72.2 38.9 12.0
7 S#2 (optional) Angiola tower 119 32 35 56 20
64.8 35.0 10.8
8 Woodlake 119 6 36 24
52.8 28.5 8.8
5 Harris River (MKR) 119 27 36 47
22.3 12.0 3.7
0 Fresno (FAT) 119 42 36 47
Total 1168.2 630.4 194.7 40.0
The second circuit begins at way point #9 with a long transect parallel to the foothills of
the Sierra Nevada at an altitude just below the top of the mixed layer. At the northern turn point
(#10), the aircraft returns along the same transect but at the lowest safe and permissible altitude
(500 to 1000 ft AGL) above the terrain. A spiral can again be flown around the Angiola tower
from lowest safe altitude to above the mixed layer.
Chapter 2: FIELD MEASUREMENTS 2-65