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Photometric and Tau Statistics
| WATER VAPOUR AND PHOTOMETRIC
CONDITIONS |
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The table below shows, for all UKIRT standards nights from 2001 through
2002, estimates of the atmospheric water vapour (as measured by CSO optical
depth at 225 GHz) and the photometric quality of the night (yes or no). The
left hand set is sorted into photometric and nonphotometric nights, the righthand
set is sorted by tau (split at 0.1 to give a roughly equal number of points).
Our thanks to the CSO for their archive of tau measurements. For a more
detailed description of tau statistics, click here.
| Date |
Photometric |
tau |
BLOCK AVERAGE |
|
Date |
Photometric |
tau |
BLOCK PHOTOMETRIC PERCENTAGE |
| 20020806 |
n |
0.2 |
0.28 |
|
20020216 |
y |
0.06 |
67% |
| 20020717 |
n |
0.1 |
|
20010218 |
n |
0.06 |
| 20020514 |
n |
0.3 |
|
20010217 |
y |
0.06 |
| 20020513 |
n |
0.3 |
|
20010521 |
y |
0.09 |
| 20011213 |
n |
1 |
|
20020717 |
n |
0.1 |
| 20011212 |
n |
1 |
|
20010813 |
y |
0.1 |
| 20010826 |
n |
0.15 |
|
20010618 |
n |
0.1 |
| 20010711 |
n |
0.15 |
|
20010529 |
y |
0.1 |
| 20010710 |
n |
0.35 |
|
20010423 |
y |
0.1 |
| 20010618 |
n |
0.1 |
|
20010617 |
n |
0.12 |
14% |
| 20010617 |
n |
0.12 |
|
20010429 |
n |
0.12 |
| 20010616 |
n |
0.13 |
|
20010616 |
n |
0.13 |
| 20010430 |
n |
0.14 |
|
20010430 |
n |
0.14 |
| 20010429 |
n |
0.12 |
|
20010826 |
n |
0.15 |
| 20010218 |
n |
0.06 |
|
20010828 |
y |
0.15 |
| 20020216 |
y |
0.06 |
0.11 |
|
20010711 |
n |
0.15 |
| 20010828 |
y |
0.15 |
|
20020806 |
n |
0.2 |
| 20010813 |
y |
0.1 |
|
20010804 |
y |
0.2 |
| 20010804 |
y |
0.2 |
|
20020514 |
n |
0.3 |
| 20010529 |
y |
0.1 |
|
20020513 |
n |
0.3 |
| 20010521 |
y |
0.09 |
|
20010710 |
n |
0.35 |
| 20010423 |
y |
0.1 |
|
20011213 |
n |
3 |
| 20010217 |
y |
0.06 |
|
20011212 |
n |
3 |
By A. Adamson
Email: a.adamson@jach.hawaii.edu
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