NLC 2018-07-06/07
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: 2018-07-06/07
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
21:45:01 0 clear
22:00:01 0 clear
22:15:05 0 clear
22:30:02 0 clear
22:45:09 0 clear
23:00:10 II 1 5 10 25 clear
23:15:19 II 1 5 5 25 clear
23:30:32 II 1 8 0 25 clear
23:45:32 II 1 10 0 >35 clear
00:00:32 II 2 10 355 >35 almost clear
00:15:32 II 2 10 350 >35 almost clear
00:30:32 II 3 10 345 35 almost clear
00:45:31 II 3 10 340 30 almost clear
01:00:32 II 3 10 330 20 almost clear
01:15:09 II 2 10 325 25 almost clear
01:30:02 II 1 10 325 15 almost clear
01:45:03 II 1 10 350 360 almost clear
02:00:02 0 clear
02:15:01 0 clear
02:30:01 0 clear
02:45:01 0 clear
03:00:01 0 clear
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: 2018/07/06-07
Start: 23:00
End: 01:45
Forms: II
Max elevation: 10
Max brightness: 3
Comments: Almost clear.
http://www.chiandh.eu/nlccam/20180706-07.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
The periods of absence of NLC are reported to the NLC Observers' Home Page:
Name: Horst Meyerdierks Country: Scotland Location: Edinburgh Date: 2018/07/06-07 Start: 21:45 End: 22:45 Comments: clear Name: Horst Meyerdierks Country: Scotland Location: Edinburgh Date: 2018/07/06-07 Start: 02:00 End: 03:00 Comments: clear
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) -------- ------ ----- ----- ----- ----- ----- ------------------- 23:00:10 2.000 341.9 -9.8 -1.7 45.0 0-255 q0833.jpg m0833.jpg 23:15:19 4.000 345.4 -10.4 -2.2 28.1 0-255 q0837.jpg m0837.jpg 23:30:32 8.000 349.0 -10.8 -2.5 21.1 0-255 q0842.jpg m0842.jpg 23:45:32 8.000 352.5 -11.2 -2.7 17.6 0-255 q0847.jpg m0847.jpg 00:00:32 8.000 356.0 -11.4 -2.8 15.9 0-255 q0852.jpg m0852.jpg 00:15:32 8.000 359.5 -11.5 -2.9 15.3 0-255 q0857.jpg 00:30:32 8.000 3.0 -11.4 -2.8 15.7 0-255 q0862.jpg 00:45:31 8.000 6.6 -11.2 -2.7 17.0 0-255 q0867.jpg 01:00:32 8.000 10.1 -10.9 -2.5 19.8 0-255 q0872.jpg 01:15:09 2.000 13.5 -10.5 -2.3 25.2 0-255 q0875.jpg 01:30:02 1.000 16.9 -10.0 -1.9 37.2 0-255 q0878.jpg m0878.jpg 01:45:03 1.000 20.4 -9.3 -1.4 70.1 0-255 q0882.jpg m0882.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).
