Remote Telescope Observatory-Cloud Sensor Realtime Weather

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littleming
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文章 littleming » 週六 15 6月, 2013 12:53

HK.Raymond.Tse 寫:Dear all,

With the input from Angus Lau and the tremendous assistance from Kenneth Yan, we are able to present the real-time weather charts of Remote Telescope Observatory (RTO) in Sai Kung.

The RTO is close to Pak Tam Chung (about 6km NW of Pak Tam Chung).

The real-time weather charts (2 hrs duration) can be seen at :-
http://www.raymondtse-lawyer.com/astro/ ... atory.html

The speed to show the charts may be slow due to bandwidth limitation.

Raymond Tse
You succeed finally. Thanks! [Good Job] [Good Job] [Good Job]

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littleming
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文章 littleming » 週六 15 6月, 2013 12:54

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HK.Raymond.Tse
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文章 HK.Raymond.Tse » 週一 17 6月, 2013 01:34

Dear all,

SQM Graph (magnitude per sq arc sec) is also added to the weather charts :-

http://www.raymondtse-lawyer.com/astro/ ... atory.html

Raymond Tse

HK.Raymond.Tse
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文章 HK.Raymond.Tse » 週二 18 6月, 2013 23:34

Hope tonight clear sky could be stable enough for 1 or 2 more nights.

Raymond

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文章 HK.Raymond.Tse » 週四 20 6月, 2013 11:01

The SQM has now been calibrated by setting an offset.

Best reading yesterday night (with some thin sky haze) was 20.05, or about 5.5 near eye limiting magnitude.

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kwyan
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文章 kwyan » 週六 22 6月, 2013 10:47

Hi Raymond,

How to interpret SQM and why you say reading 20.05 is about 5.5 magnitude?

HK.Raymond.Tse
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文章 HK.Raymond.Tse » 週日 23 6月, 2013 13:32

Dear Kenneth
There is both absolute mag reading per arc sec and near
Eye limiting magNELM in the SQM reading but only
I type reading can be displayed.
For graph, the absolute reading is more sensitive
whereas NELM is not displayed in details. Thus I choose
absolute reading but it is too technical.
The is a conversion table online.
I would post up the brief conversion table
later.
Raymond Tse

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鄧登凳
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文章 鄧登凳 » 週四 27 6月, 2013 16:12

The formula for conversion between visual limiting magnitude and sky brightness(in magnitude per arc second).

From: http://members.ziggo.nl/jhm.vangastel/A ... rmules.pdf
附加檔案
conversion.PNG
conversion.PNG (18.21 KiB) 已瀏覽 6451 次

HK.Raymond.Tse
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文章 HK.Raymond.Tse » 週五 05 7月, 2013 02:36

No-IP routing is now used to prevent frequent changes of IP address.

SQM meter graph will be updated soon after the computer's CPU heat sink is replaced to prevent overheating of CPU; while conversion table of sky brightness magnitude to near eye limiting magnitude is added for easy reference.

http://www.raymondtse-lawyer.com/astro/ ... atory.html

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鄧登凳
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文章 鄧登凳 » 週五 05 7月, 2013 16:06

The sky monitoring part of the webpage seems to have stopped working. :roll:

HK.Raymond.Tse
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文章 HK.Raymond.Tse » 週六 06 7月, 2013 01:37

鄧登凳 寫:The sky monitoring part of the webpage seems to have stopped working. :roll:
The SQM Pro can only run in English Window but both computers running Eng XP and Eng Win7 are under repairs.

Would try to restore SQM graph once I have fixed the Eng XP computer's CPU heat sink.

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文章 HK.Raymond.Tse » 週四 11 7月, 2013 13:20

The SQM graph is now resumed to normal operation.

Last night we have a clear sky with little clouds. Ground surface visibility is also very high with good seeing.

Sky brightness was about 19.98 at the best.

The graphical phase is now complete. The next phase will be webcast of analogue image of sky camera via RCA signal.

Any webcast expert for analogue video image ?

Raymond Tse

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