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Night Reports 2009

December 2009

Observing: 127.3 hours
Weather Loss: 198.5 hours
Technical Loss: 14.2 hours
Scheduled Maintenance: 0.0 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Dec10.90.00.0Photometric?
30 Dec5.03.02.9Photometric? RATCam fault. High humidity.
29 Dec0.010.90.0High winds.
28 Dec0.010.90.0High winds.
27 Dec3.07.90.0Non-photometric. High winds.
26 Dec10.90.00.0Non-photometric.
25 Dec0.010.90.0Merry Xmas! High humidity.
24 Dec0.010.90.0High humidity.
23 Dec0.010.90.0High humidity.
22 Dec0.010.90.0High humidity.
21 Dec0.010.90.0High humidity.
20 Dec0.010.90.0High humidity.
19 Dec5.65.30.0Non-photometric. High humidity.
18 Dec0.010.90.0High humidity.
17 Dec0.010.90.0High humidity.
16 Dec0.010.90.0High humidity.
15 Dec0.010.90.0High humidity.
14 Dec0.010.90.0High humidity.
13 Dec0.010.90.0High humidity.
12 Dec0.010.90.0High humidity.
11 Dec0.010.90.0High humidity.
10 Dec7.62.90.4Non-photometric. High winds & High humidity. Cass Torque Errors
9 Dec0.00.010.9PLC fault.
8 Dec10.90.00.0Photometric.
7 Dec10.90.00.0Photometric.
6 Dec10.80.00.0Photometric.
5 Dec10.80.00.0Photometric.
4 Dec10.80.00.0Photometric.
3 Dec10.80.00.0Photometric.
2 Dec8.52.30.0Photometric; high humidity.
1 Dec10.80.00.0Photometric.

November 2009

Observing: 211.0 hours
Weather Loss: 88.3 hours
Technical Loss: 9.3 hours
Scheduled Maintenance: 8.4 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Nov0.310.50.0Non-photometric. High humidity most of night.
29 Nov7.92.80.0Photometric. High humidity.
28 Nov4.85.90.0Photometric. High humidity.
27 Nov7.20.00.0Non-photometric. 3.5 hours scheduled maintenance at start of night.
26 Nov6.71.50.5Non-photometric. Thick cloud; two hours scheduled maintenance plus TCS focus problem (0.5h).
25 Nov8.30.00.9Photometric; RCS/instrument software problem. Plus 1.5h scheduled maintenance.
24 Nov9.30.00.0Photometric; 1.4h of scheduled maintenance at start of night.
23 Nov7.63.10.0Non-photometric; high humidity.
22 Nov0.010.70.0Thick cloud.
21 Nov10.70.00.0Non-photometric.
20 Nov8.02.60.0Photometric? High winds before dawn.
19 Nov5.40.05.2Photometric. ALT node reboot in middle of night; RATCam vacuum loss second half of night.
18 Nov6.04.60.0Photometric. High humidity & cloud.
17 Nov0.010.60.0High humidity.
16 Nov0.99.70.0Non-photometric. High humidity until end of night.
15 Nov6.24.40.0Photometric. High humidity at evening & morning.
14 Nov10.50.10.0Photometric. High winds near morning twilight.
13 Nov10.60.00.0Photometric.
12 Nov10.50.00.0Photometric.
11 Nov10.50.00.0Photometric.
10 Nov5.55.00.0Photometric. High humidty at times.
9 Nov9.90.60.0Photometric. Poor seeing. High humidity spike.
8 Nov10.50.00.0Poor seeing. Photometric?
7 Nov5.84.60.0High humidity first half. Poor Seeing. Non-photometric.
6 Nov10.40.00.0Photometric.
5 Nov0.010.40.0High humidity.
4 Nov7.80.32.3Photometric. High humidity; RCS not in OPER.
3 Nov9.50.90.0Photometric. High humidity at dawn.
2 Nov9.90.00.4Non-photometric. RCS upgrade in evening.
1 Nov10.30.00.0Non-photometric.

October 2009

Observing: 241.8 hours
Weather Loss: 36.7 hours
Technical Loss: 8.9 hours
Scheduled Maintenance: 19.8 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Oct10.20.00.0Photometric.
30 Oct10.20.00.0Photometric.
29 Oct10.20.00.0Photometric.
28 Oct0.59.70.0Non-photometric; high humidity.
27 Oct6.83.40.0Non-photometric. High humidity & rain in early morning.
26 Oct10.20.00.0Non-photometric.
25 Oct10.10.00.0Photometric.
24 Oct10.10.00.0Non-photometric.
23 Oct9.90.00.2Photometric; Cassegrain node reboot.
22 Oct10.10.00.0Non-photometric.
21 Oct0.03.07.1High humidity. Cloud camera failure.
20 Oct8.51.50.0Non-photometric; high humidity at end of night.
19 Oct8.90.80.3Non-photometric. Cassegrain torque errors causing node reboot, high humidity. Poor seeing.
18 Oct1.58.50.0Non-photometric; high humidity.
17 Oct0.00.00.0Scheduled maintenance.
16 Oct0.00.00.0Scheduled maintenance.
15 Oct9.90.00.0Non-photometric.
14 Oct9.90.00.0Non-photometric.
13 Oct9.80.00.0Non-photometric.
12 Oct9.50.00.3Photometric. Azimuth node reboot.
11 Oct9.50.00.3Non-photometric; Azimuth node reboot.
10 Oct9.70.00.0Non-photometric.
9 Oct9.70.00.0Non-photometric.
8 Oct9.70.00.0Non-photometric.
7 Oct9.40.00.3Photometric. Cassegrain node reboot.
6 Oct9.70.00.0Non-photometric?
5 Oct5.24.50.0Non-photometric. High humidity at start of night, wind spike in early hours.
4 Oct7.22.40.0Non-photometric; high wind speeds at times.
3 Oct9.20.00.4Photometric; AMN node reboot.
2 Oct9.60.00.0Photometric
1 Oct6.62.90.0Non-photometric; high humidity at start of night.

September 2009

Observing: 177.7 hours
Weather Loss: 98.0 hours
Technical Loss: 4.7 hours
Scheduled Maintenance: 0.0 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Sep0.09.50.0High humidity.
29 Sep0.09.50.0High humidity.
28 Sep0.09.40.0High humidity.
27 Sep0.09.40.0High humidity.
26 Sep9.40.00.0Photometric.
25 Sep9.30.00.0Photometric.
24 Sep8.80.00.5Photometric. Cass torque errors leading to node reboot.
23 Sep9.30.00.0Photometric.
22 Sep9.29.20.0Thick cloud & High winds.
21 Sep0.09.20.0Thick cloud.
20 Sep0.09.20.0High humidity.
19 Sep6.23.00.0High humidity at start of night, completely overcast at end of night.
18 Sep0.09.10.0High humidity.
17 Sep7.21.60.3Non-photometric. Scattered cloud with bout of high humidity. Azimuth node reboot.
16 Sep0.15.33.7Non-photometric. High humidity first half of night; RCS problems for rest of night.
15 Sep5.03.80.2Non-photometric. Some cloud & bouts of high humidity. Azimuth node reboot.
14 Sep8.01.00.0Non-photometric. Some cloud & humidity spike.
13 Sep9.00.00.0Photometric
12 Sep8.90.00.0Photometric
11 Sep8.90.00.0Photometric
10 Sep8.90.00.0Photometric?
9 Sep8.80.00.0Photometric.
8 Sep8.80.00.0Non-photometric.
7 Sep0.08.80.0Thick Cloud.
6 Sep8.70.00.0Non-photometric.
5 Sep8.70.00.0Photometric.
4 Sep8.70.00.0Photometric.
3 Sep8.60.00.0Photometric.
2 Sep8.60.00.0Photometric.
1 Sep8.60.00.0Photometric.

August 2009

Observing: 206.9 hours
Weather Loss: 7.0 hours
Technical Loss: 0.9 hours
Scheduled Maintenance: 31.9 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Aug8.00.00.5Non-photometric. ALT node reboot.
30 Aug1.57.00.0Non-photometric. Thick cloud for much of night.
29 Aug8.50.00.0Non-photometric.
28 Aug8.40.00.0Non-photometric.
27 Aug8.40.00.0Photometric?
26 Aug8.40.00.0Photometric.
25 Aug8.30.00.0Photometric.
24 Aug8.30.00.0Photometric. Observations with RISE instrument only.
23 Aug8.30.00.0Photometric.
22 Aug8.20.00.0Photometric.
21 Aug8.20.00.0Non-photometric.
20 Aug8.20.00.0Non-photometric. Lots of calima.
19 Aug8.20.00.0Non-photometric.
18 Aug8.10.00.0Photometric.
17 Aug8.10.00.0 
16 Aug8.10.00.0 
15 Aug8.10.00.0 
14 Aug8.00.00.0 
13 Aug8.00.00.0 
12 Aug7.50.00.4Non-photometric. Cass node reboot.
11 Aug0.00.00.0Pointing Test.
10 Aug7.90.00.0Photometric.
9 Aug7.80.00.0Photometric.
8 Aug7.00.00.0Non-photometric; 0.8h scheduled RCS commissioning.
7 Aug2.90.00.0Non-photometric; 4.9h scheduled RCS commissioning.
6 Aug7.50.00.0Non-photometric. More RCS commissioning (0.2h).
5 Aug7.60.00.0Photometric & 0.1h scheduled commissioning of new RCS.
4 Aug6.60.00.0Photometric & 1h scheduled commissioning of new RCS.
3 Aug3.60.00.0Photometric & 4h scheduled commissioning of new RCS.
2 Aug0.60.00.0Non-photometric & 7h scheduled FRODOSpec commissioning.
1 Aug1.60.00.0Non-photometric & 6h scheduled FRODOSpec commissioning.

July 2009

Observing: 146.1 hours
Weather Loss: 7.8 hours
Technical Loss: 66.7 hours
Scheduled Maintenance: 2.5 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Jul5.10.00.0Non-photometric & 2.5h scheduled FRODOSpec commissioning.
30 Jul0.07.50.0Calima.
29 Jul7.50.00.0Some autoguider testing/debugging
28 Jul4.90.02.5Autoguider and TCS problems
27 Jul7.40.00.0Photometric.
26 Jul7.40.00.0Photometric.
25 Jul0.80.06.6Photometric. Site wide mains failure.
24 Jul7.00.00.4Photometric? Cas node reboot.
23 Jul7.00.30.0Non-photometric. Thick cloud at times.
22 Jul7.30.00.0Non-photometric?
21 Jul7.30.00.0Non-photometric.
20 Jul7.30.00.0Non-photometric.
19 Jul7.20.00.0Photometric.
18 Jul3.80.03.4Non-photometric; chiller fault.
17 Jul7.20.00.0Photometric.
16 Jul4.70.02.5Chiller fault (2 hrs). Cas node reboot (0.5 hrs). Photometric?
15 Jul7.10.00.0Photometric.
14 Jul7.10.00.0Photometric.
13 Jul7.10.00.0Photometric.
12 Jul7.10.00.0Photometric.
11 Jul6.80.00.3Photometric. Azimuth node reboot.
10 Jul6.90.00.2Non-photometric. TCS node reboot.
9 Jul7.00.00.0Non-photometric
8 Jul5.10.01.9Maintenance & calibration in evening. Photometric.
7 Jul0.00.07.0Azimuth Motor Amplifier Failure.
6 Jul0.00.07.0Azimuth Motor Amplifier Failure.
5 Jul0.00.07.0Azimuth Motor Amplifier Failure.
4 Jul0.00.07.0Azimuth Motor Amplifier Failure.
3 Jul0.00.07.0Azimuth Motor Amplifier Failure.
2 Jul0.00.07.0Azimuth Motor Amplifier Failure.
1 Jul0.00.06.9Azimuth Motor Amplifier Failure.

June 2009

Observing: 167.4 hours
Weather Loss: 32.9 hours
Technical Loss: 7.1 hours
Scheduled Maintenance: 0.0 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Jun1.50.05.4Photometric. RISE lockup.
29 Jun6.90.00.0Photometric.
28 Jun3.03.90.0High humidity at start and end of night. Non-photometric.
27 Jun6.90.00.0Non-photometric.
26 Jun6.90.00.0Photometric.
25 Jun6.90.00.0Photometric.
24 Jun6.90.00.0Photometric.
23 Jun6.90.00.0Photometric; RATCam observations only.
22 Jun6.90.00.0Non-photometric.
21 Jun0.06.90.0Thick cloud all night.
20 Jun6.80.00.0Photometric.
19 Jun6.80.00.0Photometric.
18 Jun5.01.80.0Non-photometric. High humidity at start and end of night.
17 Jun0.06.90.0High humidity.
16 Jun0.06.90.0High humidity.
15 Jun0.46.50.0Non-photometric. High humidity most of night.
14 Jun6.90.00.0Photometric.
13 Jun5.20.01.7Photometric. Incoming mains supply failure.
12 Jun6.90.00.0Photometric.
11 Jun6.90.00.0Photometric; poor seeing.
10 Jun6.90.00.0Photometric.
9 Jun6.90.00.0Photometric.
8 Jun6.90.00.0Photometric; Encoder nonlinearity model upgrade.
7 Jun7.00.00.0Photometric.
6 Jun7.00.00.0Photometric.
5 Jun7.00.00.0Encoder Non-Linearity data collection.
4 Jun7.00.00.0Photometric.
3 Jun7.00.00.0Photometric.
2 Jun7.00.00.0Photometric. SupIRCam offline.
1 Jun7.00.00.0Photometric. SupIRCam offline.

May 2009

Observing: 195.5 hours
Weather Loss: 9.2 hours
Technical Loss: 3.3 hours
Scheduled Maintenance: 22.8 hours

DateHours UsedComment
ObservingWeatherTechnical
31 May7.10.00.0Photometric.
30 May7.10.00.0Photometric.
29 May7.10.00.0Photometric.
28 May7.10.00.0Photometric.
27 May7.10.00.0Non-photometric.
26 May7.20.00.0Photometric; poor seeing.
25 May7.20.00.0Photometric.
24 May7.20.00.1Non-photometric. Az node reboot.
23 May6.90.00.4Non-photometric. Alt node reboot.
22 May5.30.02.0Node 36 error at startup.
21 May6.70.60.0Non-photometric. High humidity.
20 May1.55.80.0Non-photometric. High winds.
19 May7.30.00.0Photometric.
18 May7.40.00.0Photometric.
17 May6.90.00.5Photometric. Az & alt node reboots (encoder nonlinearity apply errors).
16 May7.40.00.0Non-photometric
15 May7.40.00.0Non-photometric
14 May7.20.00.3Photometric. Alt node reboot (encoder nonlinearity apply error).
13 May7.50.00.0Photometric
12 May7.50.00.0Photometric
11 May7.50.00.0Photometric
10 May0.00.00.0Scheduled Maintenance.
9 May0.00.00.0Scheduled Maintenance.
8 May0.00.00.0Scheduled Maintenance.
7 May4.92.80.0Non-photometric. High winds. Poor seeing.
6 May7.70.00.0Photometric?
5 May7.80.00.0Photometric?
4 May7.80.00.0Photometric.
3 May7.90.00.0Photometric.
2 May7.90.00.0Photometric, poor seeing.
1 May7.90.00.0Most of night used for pointing tests. Non-photometric.

April 2009

Observing: 199.7 hours
Weather Loss: 49.2 hours
Technical Loss: 2.6 hours
Scheduled Maintenance: 0.0 hours

DateHours UsedComment
ObservingWeatherTechnical
30 Apr0.07.90.0Thick cloud.
29 Apr8.00.00.0Non-photometric.
28 Apr7.70.00.3Photometric. Alt node reboot.
27 Apr8.00.00.0Photometric.
26 Apr0.77.30.0Mostly high humidity.
25 Apr0.08.10.0Thick cloud.
24 Apr8.10.00.0Non-photometric.
23 Apr8.10.00.0Photometric?
22 Apr7.80.00.3Non-photometric; azimuth node reboot around midnight
21 Apr8.10.00.0Photometric
20 Apr8.20.00.0Photometric; poor seeing
19 Apr8.20.00.0Photometric.
18 Apr7.90.00.3Photometric. Alt Node reboot.
17 Apr8.30.00.0Photometric.
16 Apr8.40.00.0Photometric.
15 Apr8.40.00.0Photometric.
14 Apr8.50.00.0Photometric.
13 Apr8.30.00.2Non-photometric. Altitude node reboot.
12 Apr8.60.00.0Non-photometric.
11 Apr4.23.11.3Photometric. High humidity after midnight. Panel 36 comms problem.
10 Apr8.40.00.2Photometric. Cassegrain node reboot (not torque-related)
9 Apr3.15.50.0Non-photometric. High humidity.
8 Apr0.08.60.0Calima; no observing
7 Apr0.08.70.0Calima; no observing
6 Apr8.70.00.0Photometric
5 Apr8.80.00.0Photometric?
4 Apr8.80.00.0FRODOSpec commissioning until 22:30UT. Non-photometric.
3 Apr8.80.00.0FRODOSpec commissioning until 23UT. Photometric?
2 Apr8.80.00.0Photometric.
1 Apr8.80.00.0Photometric.

March 2009

Observing: 126.5 hours
Weather Loss: 110.3 hours
Technical Loss: 16.1 hours
Scheduled Maintenance: 37.2 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Mar8.60.00.3Photometric; cassegrain node reboot (not torque error related)
30 Mar8.90.00.0Photometric
29 Mar9.00.00.0Photometric
28 Mar6.92.10.0High humidity at start of night & near dawn; non-photometric
27 Mar0.09.10.0Ice & high humidity
26 Mar0.09.10.0Ice & high humidity
25 Mar0.09.10.0Ice & snow
24 Mar0.09.20.0Ice risk; freezing fog.
23 Mar3.26.00.0Photometric. High humidity, freezing conditions at times.
22 Mar9.00.00.2Photometric. Cassegrain node reboot.
21 Mar8.60.00.6Photometric. Autoguider focus mechanism problem at start of night; autorecovered.
20 Mar4.54.80.0Photometric? High humidity second half
19 Mar0.00.00.0Scheduled Maintenance.
18 Mar0.00.00.0Scheduled Maintenance.
17 Mar0.00.00.0Scheduled Maintenance.
16 Mar0.00.00.0Scheduled Maintenance.
15 Mar9.40.00.0Photometric?
14 Mar9.40.00.0Photometric?
13 Mar9.40.00.0Non-photometric.
12 Mar0.09.50.0Calima (dust).
11 Mar9.50.00.0Non-photometric.
10 Mar3.70.05.8Non-photometric. Cass axis stuck & RATCam instrument lockup.
9 Mar2.30.07.3Photometric. Cass axis stuck.
8 Mar0.09.60.0High humidity.
7 Mar3.36.30.0Non-photometric. High humidity in second half of night.
6 Mar6.92.20.3Non-photometric, some cloud. RCS work at start of night; overcast at times.
5 Mar9.10.00.6Photometric, some high winds. Some RCS work at start of night.
4 Mar0.09.70.0High humidity & ice.
3 Mar0.09.80.0High humidity & ice.
2 Mar0.09.80.0High humidity & ice.
1 Mar4.84.01.0Non-photometric. Devicenet and CCD control computer errors. High humidity.

February 2009

Observing: 42.7 hours
Weather Loss: 165.9 hours
Technical Loss: 3.9 hours
Scheduled Maintenance: 71.6 hours

DateHours UsedComment
ObservingWeatherTechnical
28 Feb9.80.00.0Photometric?
27 Feb0.09.80.0High humidity all night.
26 Feb0.09.90.0Freezing Fog.
25 Feb0.09.90.0Freezing Fog.
24 Feb0.06.93.0Cass sticking. Thick Cloud.
23 Feb0.010.00.0Freezing Fog.
22 Feb9.30.00.7Photometric, AMN & Cass node reboots.
21 Feb8.81.20.0Non-photometric but poor seeing; humidity spike.
20 Feb0.010.00.0Ice.
19 Feb0.010.00.0Ice.
18 Feb0.010.10.0Ice.
17 Feb4.75.20.2Non-photometric, high humidity, cassegrain torque error.
16 Feb10.10.00.0Photometric?
15 Feb0.00.00.0Scheduled Maintenance.
14 Feb0.00.00.0Scheduled Maintenance.
13 Feb0.00.00.0Scheduled Maintenance.
12 Feb0.00.00.0Scheduled Maintenance.
11 Feb0.00.00.0Scheduled Maintenance.
10 Feb0.00.00.0Scheduled Maintenance.
9 Feb0.00.00.0Scheduled Maintenance.
8 Feb0.010.30.0Possible enclosure icing. Awaiting visual inspection.
7 Feb0.010.30.0Snow & Ice.
6 Feb0.010.30.0Snow & Ice.
5 Feb0.010.40.0Freezing Fog.
4 Feb0.010.40.0Ice
3 Feb0.010.40.0High humidity.
2 Feb0.010.40.0Ice.
1 Feb0.010.40.0Ice.

January 2009

Observing: 156.7 hours
Weather Loss: 156.0 hours
Technical Loss: 18.7 hours
Scheduled Maintenance: 0 hours

DateHours UsedComment
ObservingWeatherTechnical
31 Jan0.010.50.0Ice.
30 Jan0.010.50.0Ice.
29 Jan6.04.50.0High humidity second half of night.
28 Jan10.60.00.0Non-photometric
27 Jan10.60.00.0Photometric
26 Jan10.60.00.0Non-photometric
25 Jan3.67.00.0Non-photometric. High humidity at start and end of night.
24 Jan8.60.02.0Non-photometric. Cass rotator jammed at start of night.
23 Jan9.60.01.0Non-photometric. Cass torque errors leading to node reboot & unrelated altitude node reboot.
22 Jan0.03.07.6High humidity at times. Cass rotator jammed.
21 Jan9.50.01.1Photometric. Cass torque errors leading to node reboot. Also unrelated AZM node reboot.
20 Jan10.20.00.5Photometric. Cass node reboot.
19 Jan5.75.00.0Non-photometric. High humidty second half of night.
18 Jan0.010.70.0Ice on enclosure mechanisms.
17 Jan0.010.70.0High winds.
16 Jan0.010.70.0Freezing Fog, High winds.
15 Jan0.010.70.0Freezing Fog
14 Jan9.01.70.0Photometric. High humidity at end of night.
13 Jan8.70.02.0Cass torques Erros provoking node 2 reboots. Also unrelated Alt node reboot.
12 Jan7.53.00.2Thick cloud at start of night. Cass torque errors.
11 Jan0.010.70.0High humidity & high winds
10 Jan6.53.31.0Cassegrain torque errors; high humidity in early morning
9 Jan0.010.80.0High humidity & high winds
8 Jan0.010.80.0High humidity
7 Jan0.010.80.0Freezing Fog.
6 Jan0.010.80.0Fog and Ice.
5 Jan0.010.80.0Freezing Fog.
4 Jan9.80.01.0Photometric. Cassegrain torque errors.
3 Jan9.90.00.9Photometric. Cassegrain torque errors.
2 Jan10.30.00.5Photometric. Cassegrain torque errors.
1 Jan10.00.00.9Non-photometric. Cassegrain axis torque errors.