NLC 2013-08-03/04
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 compact camera with limited field of view
A ~325-35, h ~0-40; images every 15 min
Date: 2013-08-03/04
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
20:45:05 X overcast
21:00:04 X overcast
21:15:05 X widespread cloud
21:30:09 X widespread cloud
21:45:19 X widespread cloud
22:00:31 X widespread cloud
22:15:53 X widespread cloud
22:31:24 X widespread cloud
22:46:24 X widespread cloud
23:01:24 X widespread cloud
23:16:24 X widespread cloud, firework over Castle
23:31:24 X widespread cloud
23:46:24 X widespread cloud
01:01:24 0 some cloud on horizon
01:16:24 0 some cloud on horizon
01:31:24 0? some cloud on horizon
01:46:24 I 1 4 through cloud
02:00:47 I 1 4 through cloud
02:15:47 NLC? cloud below
02:30:31 0? some cloud
02:45:19 0 some cloud
03:00:02 0 some cloud
03:15:02 X out of focus
03:30:01 X some cloud
03:45:01 X widespread 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: 2013/08/03-04
Start: 01:45
End: 02:15
Forms: I
Max elevation: 4
Max brightness: 1
Comments:
<a href="http://www.chiandh.me.uk/nlccam/20130803-04.shtml">Images</a>.
Through cloud.
forms: I: veil
II: bands
III: waves
IV: whirls
NLC: 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) -------- ------ ----- ----- ----- ----- ----- ------------------- 01:46:24 30.000 21.6 -14.6 -4.7 4.7 0-255 q8815.jpg m8815.jpg 02:00:47 15.000 25.0 -13.8 -4.2 6.3 0-255 q8820.jpg m8820.jpg 02:15:47 15.000 28.6 -12.8 -3.7 8.9 0-255 q8826.jpg m8826.jpg exp: Exposure time in seconds (200 ISO, f/2.8). 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).
