NLC 2009-07-01/02
From chi and h
Contents |
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.
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).
