
NLC 2015-07-05/06
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: 2015-07-05/06 UT forms bright height azimuth comments ness top bot left rght e.g. weather -------- ----- ------ --- --- ---- ---- -------------------------------- 21:45:01 X 22:00:01 X 22:15:01 X 22:30:01 X 22:45:03 X 23:00:10 X 23:15:19 X 23:30:19 X 23:45:18 I 1 10 <325 340 through cloud 00:00:33 I 2 10 <325 340 00:15:32 I 2 10 <325 350 through cloud 00:30:19 I,IV 3 15 325 30 00:45:20 I,II 2 12 <325 30 through cloud 01:00:19 IV 3 12 <325 30 cloud below 01:15:18 I 2 15 <325 15 01:30:10 I 2 15 <325 30 01:45:03 I 1 20 325 10 02:00:02 I 1 20 02:15:02 0 02:30:01 0 02:45:01 0 03:00:01 0 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: 2015/07/05-06 Start: 23:45 End: 02:00 Forms: I,II,IV Max elevation: 20 Max brightness: 3 Comments: Some cloud. http://www.chiandh.eu/nlccam/20150705-06.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) -------- ------ ----- ----- ----- ----- ----- ------------------- 23:45:18 4.000 352.5 -11.0 -2.6 18.8 0-255 q3756.jpg m3756.jpg 00:00:33 8.000 356.0 -11.3 -2.7 16.9 0-255 q3762.jpg 00:15:32 8.000 359.6 -11.3 -2.8 16.3 0-255 q3767.jpg 00:30:19 4.000 3.0 -11.3 -2.8 16.6 0-150 q3771.jpg 00:45:20 4.000 6.6 -11.1 -2.7 18.1 0-200 q3776.jpg 01:00:19 4.000 10.1 -10.8 -2.5 21.3 0-150 q3781.jpg 01:15:18 4.000 13.6 -10.4 -2.2 27.6 0-255 q3786.jpg 01:30:10 2.000 17.0 -9.8 -1.8 42.0 0-255 q3789.jpg 01:45:03 1.000 20.4 -9.2 -1.3 80.5 0-255 q3791.jpg m3791.jpg 02:00:02 1.000 23.8 -8.4 -0.7 133.3 0-255 q3794.jpg m3794.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).