NLC 2010-06-27/28
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: Stichill Eastfield, 55.7N 2.4W
unattended dSLR with limited field of view A ~310-20, h ~0-40
images every 15 min
Date: 2010-06-27/28
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ --- --- ---- ---- --------------------------------
21:45 0 clear
22:00 0 clear
22:15 0 few cloud patches
22:30 0 few cloud patches
22:45 0 cloud patches
23:00 0 cloud patches
23:15 X only partly clear
23:30 X only partly clear
23:45 X patchy cloud, lightbox
00:00 X patchy cloud
00:15 X cloud patches
00:30 NLC? 1 4 ~355 ~10 almost clear
00:45 NLC? 1 4 0 5 clear
01:00 0 clear
01:15 0 clear
01:30 0 clear
01:45 0 cloud on left
02:00 X patchy cloud
02:15 0 cloud to h 5
02:30 0 cloud to h 10
02:45 0 cloud patches
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: Stichill
Date: 2010/06/27-28
Start: 00:30
End: 00:45
Forms: NLC?
Max elevation: 5
Max brightness: 1
Comments:
<a href="http://www.chiandh.me.uk/p/NLC_2010-06-27/28">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. For some, there may also be an unsharp-masked version of the image.
UT exp A hSun h15 h85 stretch image (masked) ----- ------ ----- ----- ----- ----- ----- ------------------------- 00:30 10.000 4.0 -11.0 -2.6 19.5 0-255 q30463.jpg m30463.jpg 00:45 8.000 7.5 -10.8 -2.4 21.9 0-255 q30467.jpg m30467.jpg exp: Exposure time in seconds (400 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).
