MODS1 AGw Commissioning at LDG: 20 November 2010 UTC

Observer(s): R. Pogge and B. Shappee (OSU), M. Thompson (LBTO)

Telescope Operator: G. Bechetti (LBTO)

AO Support: D. Miller (LBTO remote from Tucson)

Telescope Support: J. Urban (LBTO)

Instrument Support: D. Officer (LBTO)

Summary

Great seeing karma is in force tonight. An incoming low-pressure system is spreading heavy clouds over the sky, with a few sucker holes streaming past. At sunset the temperature is 2C, Wind 10-12m/s from the S with a few gusts, humidity 40%, pressure steady.

0200 - Temperature slowly falling towards 0C, humidity 42%, Wind 12-14m/s from the S. Clouds more than 50% over the sky illuminated by the nearly full moon.

Clouds all night, only a few sucker holes, none big enough to warrant trying to open up. Wind was steadily from the south at 10-12m/sec with gusts to 15m/s. Humidity was 35-25% with temperatures hovering around freezing.

Preparations

Dewars filled at 1530 (local time), fill was normal, hold times still >24h

Details

0700 - Clouds have been blowing high over us in waves of sucker holes all night so far. We're still closed up waiting for a break...

Humidity has been steady at 35% for the past 5 hours, south winds are gusty up to 15m/s, and temperature is barely scraping 0C. No danger of rain, just a lot of fast-moving relatively thick overcast interspersed with holes.

0930 - Overcast now, only the Moon is visible behind high clouds. Humidity still around 35%, temperature has just dipped below 0C, wind still 12-14m/s out of the south.

1100 - First signs of clearing, but the fast-moving upper-level winds disappoint again. This late it will be unlikely if the mirrors will equilibrate.

1200 - Finally some clearing for real, but it would take us sufficiently long to open up that it would be twilight when we finished. One of those kind of nights.

-- RichardPogge - 20 Nov 2010
Topic revision: r4 - 20 Nov 2010, RichardPogge
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