IPB

Welcome Guest ( Log In | Register )

New Horizon Cameras
Guest_vjkane2000_*
post Apr 22 2005, 03:57 AM
Post #1





Guests






I've been wondering what the focal lengths are for the two New Horizon cameras (Ralph and Lorri). Curious to know how much Alan et al. were able to squeeze into their weight budget.
Go to the top of the page
 
+Quote Post
 
Start new topic
Replies
gpurcell
post Apr 22 2005, 07:14 PM
Post #2


Member
***

Group: Members
Posts: 242
Joined: 21-December 04
Member No.: 127



QUOTE (vjkane2000 @ Apr 22 2005, 03:57 AM)
I've been wondering what the focal lengths are for the two New Horizon cameras (Ralph and Lorri).  Curious to know how much Alan et al. were able to squeeze into their weight budget.
*


And will they have a way to focus 'em if the bake off doesn't fit the modeling profile!
Go to the top of the page
 
+Quote Post
Bob Shaw
post Apr 22 2005, 08:07 PM
Post #3


Senior Member
****

Group: Members
Posts: 2488
Joined: 17-April 05
From: Glasgow, Scotland, UK
Member No.: 239



The sad thing about the optical calibration issues that appear to be cropping up on so many current/future missions is that 35 years ago, they had the thing done and dusted:

http://members.tripod.com/petermasek/mariner9.html

"...star images were taken during the interplanetary cruise and also while orbiting Mars to determine and then monitor other geometric properties of the cameras. The narrow angle camera had a detection threshold of 9th visual magnitude, enabling at least a few stars to be imaged in any long exposure picture. Focal lengths and relative camera alignments were computed from the star images and were found to be stable to an accuracy of a pixel throughout the mission."

Of course, that was before all the fun with Hubble!

You'd think, though, that after Hubble, and MCO, and Genesis there's be a sorta checklist cum diary on each of the mission staff's desks - you know, things like:

* Fix Focus by Friday
* Go Metric on Monday
* Set pyros after Sunday (AKA This Way Up on Wednesday!)


--------------------
Remember: Time Flies like the wind - but Fruit Flies like bananas!
Go to the top of the page
 
+Quote Post
hendric
post Sep 12 2005, 08:39 AM
Post #4


Director of Galilean Photography
***

Group: Members
Posts: 896
Joined: 15-July 04
From: Austin, TX
Member No.: 93



QUOTE (Bob Shaw @ Apr 22 2005, 08:07 PM)
The sad thing about the optical calibration issues that appear to be cropping up on so many current/future missions is that 35 years ago, they had the thing done and dusted:

http://members.tripod.com/petermasek/mariner9.html

*


Well, I'd bet $10 that the pixels now are at least an order of magnitude smaller, if not more, than the pixels for Mariner 9. I'd bet $1 they're 2 or more.


--------------------
Space Enthusiast Richard Hendricks
--
"The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke
Mother Nature is the final inspector of all quality.
Go to the top of the page
 
+Quote Post

Posts in this topic
- vjkane2000   New Horizon Cameras   Apr 22 2005, 03:57 AM
- - gpurcell   QUOTE (vjkane2000 @ Apr 22 2005, 03:57 AM)I...   Apr 22 2005, 07:14 PM
|- - Bob Shaw   The sad thing about the optical calibration issues...   Apr 22 2005, 08:07 PM
||- - hendric   QUOTE (Bob Shaw @ Apr 22 2005, 08:07 PM)The s...   Sep 12 2005, 08:39 AM
|- - aharris   QUOTE (gpurcell @ Apr 22 2005, 02:14 PM)And w...   Sep 8 2005, 03:42 AM
- - edstrick   The Mariner 4 images of Mars were badly degraded b...   Sep 12 2005, 09:13 AM
|- - tedstryk   QUOTE (edstrick @ Sep 12 2005, 09:13 AM)but:...   Sep 12 2005, 10:20 AM
|- - Bob Shaw   I take the point regarding the steep learning curv...   Sep 12 2005, 08:22 PM
- - edstrick   Bob Shaw: "... but it doesn't change the...   Sep 12 2005, 08:44 PM
|- - tedstryk   QUOTE (edstrick @ Sep 12 2005, 08:44 PM)Fogge...   Sep 12 2005, 10:06 PM
|- - mcaplinger   QUOTE (edstrick @ Sep 12 2005, 12:44 PM)Bob S...   Sep 13 2005, 09:42 PM
||- - Bob Shaw   QUOTE (mcaplinger @ Sep 13 2005, 10:42 PM)I d...   Sep 14 2005, 09:44 AM
||- - dvandorn   QUOTE (Bob Shaw @ Sep 14 2005, 04:44 AM)The f...   Sep 14 2005, 10:00 AM
|- - RNeuhaus   QUOTE (edstrick @ Sep 12 2005, 03:44 PM)...be...   Sep 14 2005, 08:40 PM
- - edstrick   The Deep Impact defocus problem has distinct simil...   Sep 14 2005, 09:58 AM
|- - tedstryk   QUOTE (edstrick @ Sep 14 2005, 09:58 AM)Sadly...   Sep 14 2005, 01:18 PM
- - edstrick   Anyway.... there's essentially no such thing a...   Sep 14 2005, 10:45 AM
- - djellison   I think the MRI, as with the impactor camera ( the...   Sep 14 2005, 01:23 PM
|- - um3k   QUOTE (djellison @ Sep 14 2005, 09:23 AM)I th...   Sep 14 2005, 03:34 PM
- - djellison   Oo - my bad, thought it was a straight copy. Perha...   Sep 14 2005, 03:47 PM
- - BruceMoomaw   I've heard nothing to suggest that they didn...   Sep 14 2005, 07:55 PM
|- - tedstryk   In addition, if they can get what appear to be col...   Sep 14 2005, 08:32 PM
- - BruceMoomaw   The article on Deep Impact imaging of geological f...   Sep 15 2005, 06:16 AM
- - djellison   Well - I saw a reasonable colour image at the BAA ...   Sep 15 2005, 07:11 AM
- - edstrick   Bruce Moomaw: ".... -- if, of course, there a...   Sep 15 2005, 08:02 AM
- - MarsInMyLifetime   At risk of reopening what appears to be a dead thr...   May 26 2015, 05:48 PM
|- - mcaplinger   QUOTE (MarsInMyLifetime @ May 26 2015, 10...   May 26 2015, 06:20 PM
||- - Xcalibrator   QUOTE (mcaplinger @ May 26 2015, 01:20 PM...   May 28 2015, 02:51 PM
|- - Gerald   QUOTE (MarsInMyLifetime @ May 26 2015, 07...   May 26 2015, 08:41 PM
|- - MarsInMyLifetime   Thanks, all. I had read this on p. 12 and somehow ...   May 27 2015, 07:52 PM
|- - MarsInMyLifetime   QUOTE (Gerald @ May 26 2015, 03:41 PM) An...   May 27 2015, 08:02 PM
- - Brian Swift   Just came across a 1/2021 (open access) paper that...   Jan 5 2022, 11:44 PM


Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 19th March 2024 - 04:36 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.