NLC 2016-07-22/23
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: 2016-07-22/23
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
21:15:01 0 cloud on right
21:30:02 0 cloud patches on right
21:45:05 0 cloud at right to h 5
22:00:09 0 cloud patches at right to h 5
22:15:19 0 cloud patches at right
22:30:19 0 cloud patches at right to h 5
22:45:32 II 2 4 20 through cloud
23:00:54 II 3 5 10 through cloud
23:15:48 II 4 6 5 >35 through some cloud
23:30:47 II,IV 4 6 0 >35 through some cloud
23:45:47 IV 4 7 0 >35
00:01:24 II,IV 4 8 0 >35
00:15:47 II,IV 5 6 10 >35 some cloud patches above
00:30:47 IV 5 6 350 >35 cloud above
00:45:47 IV 5 15 >35 through cloud
01:00:25 IV 5 8 5 >35 aircraft trail
01:15:26 II,IV 5 10 0 >35 some cloud patches above
01:30:26 II,IV 5 11 345 >35 some cloud patches above
01:45:32 II,IV 5 12 340 >35 some cloud patches above
02:00:18 I,II 5 15 330 >35
02:15:10 II 5 23 <325 >35
02:30:02 I,II 4 35 <325 >35
02:45:02 I,III 3 50 <325 >35
03:00:01 I,III 2 >50 <325 >35
03:15:02 I,III 1
03:30:01 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: 2016/07/22-23
Start: 22:45
End: 03:15
Forms: I,II,III,IV
Max elevation: >50
Max brightness: 5
Comments: http://www.chiandh.eu/nlccam/20160722-23.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) -------- ------ ----- ----- ----- ----- ----- ------------------- 22:45:32 8.000 337.6 -11.5 -2.9 15.2 0-255 q4904.jpg 23:00:54 15.000 341.2 -12.3 -3.4 11.0 0-255 q4910.jpg 23:15:48 15.000 344.7 -12.9 -3.7 8.7 0-255 q4915.jpg 23:30:47 15.000 348.3 -13.4 -4.0 7.3 0-255 q4921.jpg 23:45:47 15.000 351.9 -13.7 -4.2 6.4 0-255 q4927.jpg 00:01:24 30.000 355.7 -14.0 -4.4 5.9 0-255 q4934.jpg 00:15:47 15.000 359.2 -14.1 -4.4 5.7 0-255 q4939.jpg 00:30:47 15.000 2.8 -14.0 -4.4 5.7 0-255 q4945.jpg 00:45:47 15.000 6.4 -13.9 -4.3 6.1 0-255 q4951.jpg 01:00:25 8.000 9.9 -13.6 -4.1 6.8 0-255 q4956.jpg 01:15:26 8.000 13.5 -13.1 -3.9 7.9 0-255 q4962.jpg 01:30:26 8.000 17.1 -12.6 -3.6 9.7 0-255 q4968.jpg 01:45:32 8.000 20.7 -11.9 -3.1 12.7 0-255 q4975.jpg 02:00:18 4.000 24.1 -11.1 -2.6 18.2 0-255 q4980.jpg 02:15:10 2.000 27.6 -10.2 -2.1 31.3 0-255 q4984.jpg 02:30:02 1.000 30.9 -9.2 -1.3 78.9 0-255 q4987.jpg 02:45:02 0.500 34.3 -8.1 -0.4 144.6 0-255 q4989.jpg 03:00:01 0.250 37.6 -6.8 0.9 163.2 0-255 q4991.jpg 03:15:02 0.067 40.9 -5.5 3.5 170.4 0-255 q4993.jpg m4993.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).
