NLC 2009-07-01/02
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 dSLR with limited field of view A ~325-35, h ~0-40
images every 5 min
Date: 2009-07-01/02
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ ------- ---- ---- --------------------------------
21:40 X cloud to h 15
21:45 X cloud to h 15
21:50 X cloud to h 15
21:55 X cloud to h 10
22:00 X cloud to h 10
22:05 X cloud to h 10
22:10 X cloud to h 10
22:15 X cloud to h 10
22:20 X cloud to h 15
22:25 X cloud to h 15
22:30 X cloud to h 15
22:35 II 1 amongst cirrus
22:40 II 1 amongst cirrus
22:45 II 2 amongst cirrus
22:50 II 2 10 amongst cirrus
22:55 II 3 10 amongst cirrus
23:00 II 3 10 <350 >20 amongst cloud
23:05 II 3 10 <350 >20 amongst cloud
23:10 II 3 10 <350 >20 amongst cloud
23:15 II 3 10 <355 >25 amongst cloud
23:20 II 3 10 <355 >25 amongst cloud
23:25 II 3 10 <350 >25 amongst cloud
23:30 II 3 10 <350 >25 amongst cloud
23:35 II through cloud gap
23:40 NLC through cloud gap
23:45 NLC through cloud gap
23:50 NLC through cloud gap
23:55 NLC through cloud gap
00:00 X cloudy
00:05 X cloudy
00:10 X cloudy
00:15 X cloud to h 15
00:20 X cloud to h 15
00:25 X cloud to h 15
00:30 X cloud to h 15
00:35 X cloud to h 15
00:40 NLC 2 10 <345 >30 cloud to h 10
00:45 NLC 2 10 <340 >35 cloud to h 5
00:50 NLC 2 15 <350 >25 cloud to h 5
00:55 II 2 15 <355 >35 cloud to h 10
01:00 II 2 20 345 >35 cloud to h 10
01:05 II 2 20 350 >35 cloud to h 10
01:10 II,III 2 20 350 >35 cloud to h 10
01:15 II,III 3 20 350 >35 cloud to h 10
01:20 II 3 20 350 >35 cloud to h 5
01:25 II 3 20 350 >35 cloud to h 5
01:30 II,III 3 25 350 >35 cloud to h 10
01:35 II,III 3 25 350 >35 cloud to h 10
01:40 II,III 3 25 350 >35 cloud to h 5
01:45 II,III 3 25 350 >35 cloud to h 10
01:50 III 3 25 350 >35 cloud to h 10
01:55 III 3 25 350 >35 amongst cloud
02:00 II 3 15 0 >35 amongst cloud
02:05 II 2 15 350 >35 amongst cloud
02:10 III 1 15 amongst cloud
02:15 X cloud to h 15
02:20 III 1 15 cloud to h 10
02:25 X cloud to h 15
02:30 X cloud to h 15
02:35 X cloud to h 10
02:40 X cloud to h 10
02:45 X cloud to h 10
02:50 X cloud to h 10
02:55 X cloud to h 10
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: 2009/07/01-02
Start: 22:35
End: 02:20
Forms: II,III
Max elevation: 25
Max brightness: 3
Comments:
Cloud 00:00 to 00:35.
<a href="http://www.chiandh.me.uk/p/NLC_2009-07-01/02>Images</a>.
forms: I: veil
II: bands
III: waves
IV: whirls
O: 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) ----- ------ ----- ----- ----- ----- ----- --------------------- 22:35 1.300 336.5 -8.1 -0.5 142.6 0-255 q04538.jpg m04538.jpg 22:40 2.500 337.6 -8.4 -0.7 132.5 0-255 q04539.jpg m04539.jpg 22:45 2.500 338.7 -8.7 -0.9 118.6 0-255 q04540.jpg m04540.jpg 22:50 3.200 339.9 -8.9 -1.1 101.2 0-255 q04541.jpg 22:55 4.000 341.0 -9.1 -1.3 82.6 0-255 q04543.jpg 23:00 2.000 342.2 -9.4 -1.5 66.2 0-200 q04546.jpg 23:05 4.000 343.3 -9.6 -1.6 53.7 0-255 q04548.jpg 23:10 4.000 344.4 -9.8 -1.8 44.6 0-200 q04551.jpg 23:15 4.000 345.6 -10.0 -1.9 38.2 0-200 q04554.jpg 23:20 4.000 346.8 -10.1 -2.0 33.4 0-200 q04557.jpg 23:25 4.000 347.9 -10.3 -2.1 29.9 0-200 q04560.jpg 23:30 8.000 349.1 -10.4 -2.2 27.2 0-255 q04563.jpg 23:35 8.000 350.2 -10.5 -2.3 25.0 0-255 q04567.jpg 23:40 8.000 351.4 -10.7 -2.3 23.4 0-255 q04571.jpg 23:45 8.000 352.6 -10.7 -2.4 22.1 0-255 q04575.jpg 23:50 8.000 353.7 -10.8 -2.5 21.1 0-255 q04579.jpg 23:55 8.000 354.9 -10.9 -2.5 20.3 0-200 q04583.jpg 00:40 8.000 5.4 -10.9 -2.5 20.5 0-200 q04619.jpg 00:45 8.000 6.6 -10.8 -2.5 21.3 0-200 q04623.jpg 00:50 8.000 7.8 -10.7 -2.4 22.4 0-255 q04627.jpg 00:55 8.000 8.9 -10.6 -2.3 23.8 0-255 q04631.jpg 01:00 8.000 10.1 -10.5 -2.3 25.6 0-255 q04635.jpg 01:05 4.000 11.3 -10.4 -2.2 27.8 0-200 q04639.jpg 01:10 4.000 12.4 -10.2 -2.1 30.7 0-200 q04642.jpg 01:15 4.000 13.6 -10.1 -2.0 34.6 0-200 q04645.jpg 01:20 4.000 14.7 -9.9 -1.8 39.7 0-255 q04648.jpg 01:25 2.000 15.9 -9.7 -1.7 46.8 0-200 q04652.jpg 01:30 2.000 17.0 -9.5 -1.6 56.6 0-200 q04655.jpg 01:35 2.000 18.2 -9.3 -1.4 70.2 0-200 q04657.jpg 01:40 2.000 19.3 -9.1 -1.2 87.4 0-200 q04659.jpg 01:45 2.000 20.5 -8.8 -1.1 106.1 0-255 q04661.jpg 01:50 2.500 21.6 -8.6 -0.9 122.7 0-255 q04662.jpg 01:55 2.000 22.7 -8.3 -0.6 135.5 0-255 q04663.jpg 02:00 1.300 23.9 -8.1 -0.4 144.8 0-255 q04664.jpg 02:05 1.300 25.0 -7.8 -0.1 151.5 0-255 q04665.jpg 02:10 1.000 26.1 -7.5 0.2 156.5 0-255 q04666.jpg m04666.jpg 02:20 0.600 28.3 -6.8 0.9 163.3 0-255 q04668.jpg m04668.jpg exp: Exposure time in seconds (200 ISO, f/3.5). 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).
