
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).