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by tonybarry
Fri Mar 14, 2014 10:22 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi Martin,

The Foundation will do as it wishes. The trick is to get the wish.

Regards,
TB
by tonybarry
Fri Mar 14, 2014 9:50 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi Gordon / Foundation people,

If I can re-iterate my +1 for this project while you are looking …

Regards,
Tony Barry
by tonybarry
Sun Mar 02, 2014 9:12 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi James,

As with Martin (hardware man) I am still very interested in the HDMI-in board (as it presently stands).

Regards,
Tony Barry
by tonybarry
Thu Jan 02, 2014 1:25 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

HI folks,

If it's any help, almost all occultation cameras output monochrome. Luminance only.

Regards,
Tony Barry
by tonybarry
Thu Jan 02, 2014 12:59 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi Gordon, Thank you for the post. I would be pleased to see more of your HDMI in board :-) The low-light cameras currently in use offer field (720i60) and frame (720p30) output (i.e. standard interlaced CVBS). Field analysis of occultations is a thorny subject, with some folks saying it is tolerabl...
by tonybarry
Thu Jan 02, 2014 12:53 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi James, The standard in the occultation community is to use GPS based 1PPS signals for absolute time fidelity (referenced to UT). Other references such as NTP might be viewed as not reliable in the peculiar conditions occultation recordings frequently have to operate under (i.e. remote locations, ...
by tonybarry
Thu Jan 02, 2014 12:32 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi James and Ravenous, Frame rates are currently 720i60 (i.e field) or 720p30 (i.e.frame) of NTSC or the equivalent PAL. Most occultations (i.e. more than 70%) are done on dim stars (magnitude > 10) which require accumulation (i.e. stacked, slower frame rates). My definition of a big scope is anythi...
by tonybarry
Thu Jan 02, 2014 10:16 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi James, H.264 would probably do. Dropped frames are more troublesome than compression for occultations. This is because occs are basically a timed event, with the star either being there or being invisible when the asteroid passes in front of it. The interesting thing is the time of disappearance ...
by tonybarry
Thu Jan 02, 2014 5:14 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97646

Re: Camera Interface Specs

Hi All, I am very interested in this discussion. I am part of a community which uses analog (CVBS) cameras for astronomy occultation work http://www.asteroidoccultation.com/asteroid_help.htm and the cameras are very low-light sensitive (quantum efficiencies around 60-70%). Up till now, the Canon MV3...

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