NLC 2015-08-07/08
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: 2015-08-07/08
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
20:45:01 X widespread cloud patches
21:00:02 X widespread cloud patches
21:15:07 X widespread cloud patches
21:30:19 X widespread cloud patches
21:45:53 X cloud to h 10 or 15
22:00:54 X cloud to h 15 or 20
22:16:24 X widespread cloud
22:30:47 X widespread cloud
22:46:24 X widespread cloud patches
23:01:24 X haze to h 10
23:16:24 X haze to h 10
23:31:24 X widespread cloud
23:46:24 X widespread cloud
01:01:25 X widespread cloud
01:16:24 X widespread cloud
01:31:23 X widespread cloud
01:46:24 X widespread cloud
02:01:23 X cloud on right
02:16:24 X cloud to h 5
02:30:46 I 2 8 through cloud
02:45:19 X widespread cloud
03:00:18 X almost overcast
03:15:10 X almost overcast
03:30:07 X almost overcast
03:45:01 X almost overcast
04:00:02 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: 2015/08/07-08
Start: 02:30
End: 03:30
Forms: I
Max elevation: 8
Max brightness: 2
Comments:
http://www.chiandh.eu/nlccam/20150807-08.shtml
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) -------- ------ ----- ----- ----- ----- ----- ------------------- 02:30:46 15.000 32.5 -12.6 -3.6 9.5 0-255 q7238.jpg m7238.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).
