NLC 2009-07-13/14
From chi and h
Contents |
BAA report
The report to the BAA Aurora Section gives an overview of the night, which times were cloudy, free of NLC, or with sightings of NLC.
Name of observer: Horst Meyerdierks
Location: Royal Observatory Edinburgh, 55.9N 3.2W
unattended dSLR with limited field of view A ~325-35, h ~0-40
images every 5 min
Date: 2009-07-13/14
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ ------- ---- ---- --------------------------------
21:30 X cloud
21:45 X cloud
22:00 X cloud
22:15 X cloud
22:30 X cloud
22:45 X cloud
23:00 X cloud
23:15 X cloud
23:30 X cloud
23:45 X cloud
00:00 X cloud
00:15 X cloud
00:30 X cloud
00:45 X cloud
01:00 X cloud
01:15 X cloud
01:30 X cloud
01:45 X cloud
02:00 NLC 3 through cloud gap
02:15 I,II 4 >40 cloud below and patches
02:30 I,II,III 4 through cloud gap
02:45 X cloud
03:00 NLC 2 patchy cloud
forms: I: veil
II: bands
III: waves
IV: whirls
NLC: other than or multiple of I-IV
0: no NLC
X: no decision possible (mist, cloud etc.)
brightness: 1: very weak
2: clearly detected
3: clearly visible
4: very bright
5: extremely bright
NLCnet report
The periods of positive sightings of NLC are reported to the NLC Observers' Home Page:
Name: Horst Meyerdierks
Country: Scotland
Location: Edinburgh
Date: 2009/07/13-14
Start: 02:00
End: 03:00
Forms: I,II,III
Max elevation:
Max brightness: 4
Comments:
<a href="http://www.chiandh.me.uk/p/NLC_2009-07-13/14>Images</a>.
forms: I: veil
II: bands
III: waves
IV: whirls
O: other than or multiple of I-IV
brightness: 1: very weak
2: clearly detected
3: clearly visible
4: very bright
5: extremely bright
Images
Listed below are the images with positive sightings of NLC. These have been processed merely to adjust the brightness for underexposure.
UT exp A hSun h15 h85 stretch image ----- ------ ----- ----- ----- ----- ----- ------------ 02:00 6.000 23.8 -9.5 -1.5 59.3 0-255 q06892.jpg 02:15 2.500 27.2 -8.6 -0.8 124.0 0-255 q06899.jpg 02:30 1.000 30.6 -7.6 0.1 155.1 0-255 q06902.jpg 03:00 0.167 37.2 -5.2 4.5 171.3 0-255 q06908.jpg exp: Exposure time in seconds (200 ISO, f/3.5). A: Azimuth of the Sun (degrees). hSun: Altitude of the Sun (degrees, negative below horizon). h15: Max. altitude of sunlight at 15 km height (degrees). h85: Max. altitude of sunlight at 85 km height (degrees). stretch: Contrast stretch (0-255 means no stretch).
