
NLC 2014-07-22/23
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: 2014-07-22/23 UT forms bright height azimuth comments ness top bot left rght e.g. weather -------- ----- ------ --- --- ---- ---- -------------------------------- 21:15:01 0 haze to h 5 21:30:01 0 haze to h 5 21:45:06 0 haze to h 5 22:00:02 0 haze to h 5 22:15:19 I 2 12 <325 >35 through thin cirrus, contrail 22:30:32 I,III 2 12 <325 >35 contrail dark/bright 22:45:53 I,IV 3 12 <325 30 also fake NLC: cirrus above h 15 23:00:53 IV 3 10 <325 also fake NLC: cirrus above h 15 23:15:47 III,IV 4 10 <325 through cirrus 23:30:47 I 4 8 <325 30 through thin cirrus 23:45:48 I,II 3 7 <325 30 through thin cirrus 00:00:47 I 3 6 <325 30 through thin cirrus 00:15:47 I 3 5 fog to h 2 00:30:47 X fog 00:45:46 X fog 01:00:47 X fog 01:15:26 X fog 01:30:25 X fog 01:45:32 X fog 02:00:32 X fog 02:15:31 X fog 02:30:09 X fog 02:45:09 X fog 03:00:08 X fog 03:15:05 X fog 03:30:04 X fog 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: 2014/07/22-23 Start: 22:15 End: 00:15 Forms: I,II,III,IV Max elevation: 12 Max brightness: 4 Comments: Through cloud. <a href="http://www.chiandh.me.uk/nlccam/20140722-23.shtml">Images</a>. 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) -------- ------ ----- ----- ----- ----- ----- ------------------- 22:15:19 4.000 330.7 -9.5 -1.6 55.4 0-255 q6356.jpg m6356.jpg 22:30:32 8.000 334.1 -10.5 -2.3 25.1 0-255 q6360.jpg 22:45:53 15.000 337.7 -11.4 -2.8 15.7 0-255 q6365.jpg 23:00:53 15.000 341.2 -12.2 -3.3 11.5 0-255 q6370.jpg 23:15:47 15.000 344.7 -12.8 -3.7 9.1 0-255 q6375.jpg 23:30:47 15.000 348.3 -13.3 -3.9 7.6 0-255 q6381.jpg 23:45:48 15.000 351.9 -13.6 -4.2 6.7 0-255 q6387.jpg 00:00:47 15.000 355.5 -13.8 -4.3 6.1 0-255 q6393.jpg 00:15:47 15.000 359.2 -13.9 -4.3 5.9 0-255 q6399.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).