Date: Fri, 23 Oct 2009 22:31:30 -0000 (UTC)
Subject: Re: 2.5m obslog 20091022 (MJD 55127)
From: "Viktor Malanushenko"
Hi, Wendell,
Thank you for your e-mail.
Nevertheless, the error of rotators was and our last night of observations.
Perhaps it happened when the temperature of the telescope is
lower than during the day.
The last two nights the tempperature was about 2-3 C degrees.
Viktor Malanushenko
Wendell Jordan wrote:
>
> On Oct 23, 2009, at 6:31 AM, Viktor M wrote:
>
>>
>>                       APACHE POINT OBSERVATORY SDSS 2.5M
>>
>>                                 OBSERVING LOG
>>                           Thursday October 22, 2009
>>
>>                                  (MJD 55127)
>>
>> ---=== OBSERVING TEAM ===---
>>
>>
>> Alaina Shelden
>> Viktor Malanushenko
>>
>> 00:07Z   Rotator brake was tripped mid slew again.  From 0-90,
>> tripped at ~35.
>
> I did a number of back and forth, CW/CCW rotator passes, especially
> around 35 degrees, where last nights rotator halt occurred.  Today's
> test started, and is date stamped on MJD 55128 @ 19:33 UT should Dan
> get the urge to compare TPM rotator strip charts in hopes of finding
> an "over current" trip in last nights failure.  Once again, the
> rotator  problem seen last night could not be reproduced in today's
> test.
>
> Wendell
>
>
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