
NLC 2013-08-04/05
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: 2013-08-04/05 UT forms bright height azimuth comments ness top bot left rght e.g. weather -------- ----- ------ --- --- ---- ---- -------------------------------- 20:45:01 X widespread cloud 21:00:02 X widespread cloud 21:15:02 X widespread cloud 21:30:10 X widespread cloud 21:45:19 X widespread cloud 22:00:32 NLC? through cloud 22:15:47 NLC 1 3 0 through cloud 22:30:47 NLC 1 3 0 10 through cloud 22:45:47 0 some cloud 23:00:46 0 some cloud 23:15:47 0 some cloud 23:30:47 0 some cloud 23:46:24 0 some cloud 01:01:25 X haze 01:16:24 X haze 01:31:24 NLC 2 4 20 30 through cloud 01:46:24 NLC 2 5 15 25 through cloud 02:01:24 NLC 1 through cloud 02:16:25 X almost overcast 02:30:53 X almost overcast 02:45:32 X almost overcast 03:00:19 X almost overcast 03:15:08 X almost overcast 03:30:06 X almost overcast 03:45:04 X almost overcast 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: 2013/08/04-05 Start: 22:00 Start: 01:30 End: 22:30 End: 02:00 Forms: NLC Max elevation: 3 Max elevation: 5 Max brightness: 1 Max brightness: 2 Comments: <a href="http://www.chiandh.me.uk/nlccam/20130804-05.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) -------- ------ ----- ----- ----- ----- ----- ------------------- 22:00:32 8.000 326.4 -11.5 -2.9 15.3 0-255 q8863.jpg 22:15:47 15.000 329.9 -12.6 -3.6 9.6 0-255 q8868.jpg m8868.jpg 22:30:47 15.000 333.5 -13.6 -4.2 6.7 0-255 q8874.jpg m8874.jpg 01:31:24 30.000 18.0 -15.5 -5.2 3.1 0-255 q8923.jpg 01:46:24 30.000 21.7 -14.8 -4.8 4.2 0-255 q8929.jpg 02:01:24 30.000 25.3 -14.0 -4.4 5.8 0-255 q8935.jpg m8935.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).