Grand Benare / Paranal
One of the main goal of the study was to monitor the atmospheric water vapor
through a spectral hygrometer.
Here is a small comparison made by Arne Ardeberg (Lund Observatory) between atmospheric water vapor data for Grand Benare
and Paranal (the VLT's site in Chile) from August 1986 to February 1987.
All measurements
| |
|
|
Grand Benare |
|
|
|
PARANAL |
|
| Month |
|
n |
Mean |
 |
|
n |
Mean |
|
| 8608 |
|
66 |
2.3509 |
2.3835 |
|
307 |
2.1997 |
1.1103 |
| 8609 |
|
111 |
1.6364 |
1.4100 |
|
372 |
1.5395 |
0.7764 |
| 8610 |
|
114 |
5.7054 |
3.7183 |
|
358 |
2.0886 |
1.0501 |
| 8611 |
|
96 |
5.4256 |
2.5441 |
|
286 |
3.4954 |
1.6290 |
| 8612 |
|
55 |
9.4247 |
2.2858 |
|
294 |
4.3972 |
2.1979 |
| 8701 |
|
115 |
6.9614 |
2.7503 |
|
182 |
3.3485 |
1.5800 |
| 8702 |
|
24 |
10.0908 |
1.8546 |
|
254 |
4.7931 |
2.8308 |
Night measurements
| |
|
|
Grand Benare |
|
|
|
PARANAL |
|
| Month |
|
n |
Mean |
|
|
n |
Mean |
|
| 8608 |
|
47 |
2.3626 |
2.4820 |
|
135 |
2.1637 |
1.1225 |
| 8609 |
|
86 |
1.5310 |
1.2745 |
|
157 |
1.5597 |
0.8561 |
| 8610 |
|
72 |
5.7651 |
3.7711 |
|
125 |
2.1620 |
1.2432 |
| 8611 |
|
60 |
5.6045 |
2.6264 |
|
103 |
3.9219 |
1.9446 |
| 8612 |
|
35 |
9.5923 |
2.4488 |
|
110 |
4.5457 |
2.4747 |
| 8701 |
|
64 |
6.5831 |
2.7840 |
|
48 |
3.5648 |
1.8454 |
| 8702 |
|
14 |
9.8229 |
1.9918 |
|
106 |
4.8575 |
2.9862 |
Twilight measurements
| |
|
|
Grand Benare |
|
|
|
PARANAL |
|
| Month |
|
n |
Mean |
|
|
n |
Mean |
|
| 8608 |
|
19 |
2.3221 |
2.1842 |
|
62 |
2.3145 |
1.1948 |
| 8609 |
|
25 |
1.9988 |
1.7840 |
|
82 |
1.5232 |
0.8121 |
| 8610 |
|
42 |
5.6031 |
3.6689 |
|
89 |
2.0164 |
1.1776 |
| 8611 |
|
36 |
5.1275 |
2.4071 |
|
67 |
3.4778 |
1.6937 |
| 8612 |
|
21 |
9.2552 |
2.0248 |
|
86 |
4.6367 |
2.2772 |
| 8701 |
|
51 |
7.4361 |
2.6284 |
|
61 |
3.2733 |
1.7223 |
| 8702 |
|
10 |
10.4660 |
1.6709 |
|
41 |
4.6768 |
2.9962 |
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