IPB

Welcome Guest ( Log In | Register )

35 Pages V  « < 14 15 16 17 18 > »   
Reply to this topicStart new topic
Spring at Cape York, Sol 2947 (after Greeley Haven) - sol 3040
ElkGroveDan
post Jul 5 2012, 02:02 AM
Post #226


Senior Member
****

Group: Admin
Posts: 4750
Joined: 15-March 05
From: Sloughhouse, CA
Member No.: 197



QUOTE (ngunn @ Jul 4 2012, 05:55 AM) *
(I assume those are at one Earth year intervals.)

They are really just random grabs spread out from Sol 2 to the present.


--------------------
If Occam had heard my theory, things would be very different now.
Go to the top of the page
 
+Quote Post
Astro0
post Jul 5 2012, 05:48 AM
Post #227


Senior Member
****

Group: Admin
Posts: 3108
Joined: 21-December 05
From: Canberra, Australia
Member No.: 615



Grasberg1

Attached Image


Sol3001: Via Odyssey

Ah! Did you see what I did there?! cool.gif laugh.gif
Go to the top of the page
 
+Quote Post
ngunn
post Jul 5 2012, 10:14 AM
Post #228


Senior Member
****

Group: Members
Posts: 3496
Joined: 4-November 05
From: North Wales
Member No.: 542



QUOTE (ElkGroveDan @ Jul 5 2012, 03:02 AM) *
They are really just random grabs spread out from Sol 2 to the present.


Well you luckily managed to sample aphelion and perihelion well enough to show the periodic variation. I'd really love to see a full 8 year movie. I was wondering whether such a movie would also show the variations in atmospheric opacity, or is that somehow normalised out in the imaging process?
Go to the top of the page
 
+Quote Post
RoverDriver
post Jul 5 2012, 04:08 PM
Post #229


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



I have assembled all of the pancam tau images (4779!) I could find.

Attached Image

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
Bill Harris
post Jul 5 2012, 04:26 PM
Post #230


Senior Member
****

Group: Members
Posts: 2621
Joined: 30-October 04
Member No.: 105



QUOTE (mhoward @ Jul 4 2012, 11:27 AM) *
So I guess we've answered that question: no, there is not any type of MER image that we find uninteresting smile.gif

(Attached is a view facing north and about 45 degrees up, with the sun images from sols 2816-2914.)
Think "analemma"... smile.gif

--Bill


--------------------
Go to the top of the page
 
+Quote Post
PaulM
post Jul 5 2012, 05:23 PM
Post #231


Member
***

Group: Members
Posts: 195
Joined: 15-August 07
From: Shrewsbury, Shropshire
Member No.: 3233



QUOTE (RoverDriver @ Jul 5 2012, 05:08 PM) *
I have assembled all of the pancam tau images (4779!) I could find.
Paolo

Has a sunspot ever been seen in a pancam tau image? I remember in about 1976 seeing a large sunspot using my naked eye when the sun was close to the horizon. I wonder if that sunspot would have been visible in a pancam tau image?
Go to the top of the page
 
+Quote Post
RoverDriver
post Jul 5 2012, 06:44 PM
Post #232


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



QUOTE (PaulM @ Jul 5 2012, 09:23 AM) *
Has a sunspot ever been seen in a pancam tau image? I remember in about 1976 seeing a large sunspot using my naked eye when the sun was close to the horizon. I wonder if that sunspot would have been visible in a pancam tau image?


I hope not. The IFOV (instantaneous field of view, the field of view of 1 pixel) is about 50" (arc seconds), the sun spot would need to be be quite big! Pancam Tau are taken usually around 1100-1200, so no atmospheric magnification.

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
ngunn
post Jul 5 2012, 07:22 PM
Post #233


Senior Member
****

Group: Members
Posts: 3496
Joined: 4-November 05
From: North Wales
Member No.: 542



QUOTE (RoverDriver @ Jul 5 2012, 05:08 PM) *
I have assembled all of the pancam tau images (4779!) I could find.


Hey, that's great! Thanks. smile.gif smile.gif smile.gif But with sooooo many images the seasonal 'breathing' though quite apparent is almost imperceptibly slow.
Go to the top of the page
 
+Quote Post
ElkGroveDan
post Jul 5 2012, 07:23 PM
Post #234


Senior Member
****

Group: Admin
Posts: 4750
Joined: 15-March 05
From: Sloughhouse, CA
Member No.: 197



QUOTE (Astro0 @ Jul 4 2012, 09:48 PM) *
Ah! Did you see what I did there?! cool.gif laugh.gif

I see so many little veins in Grasberg that Carly Simon could write a song about it.


--------------------
If Occam had heard my theory, things would be very different now.
Go to the top of the page
 
+Quote Post
RoverDriver
post Jul 5 2012, 07:24 PM
Post #235


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



QUOTE (ngunn @ Jul 5 2012, 11:22 AM) *
Hey, that's great! Thanks. smile.gif smile.gif smile.gif But with sooooo many images the seasonal 'breathing' though quite apparent is almost imperceptibly slow.


OK, I will see what I can do.

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
fredk
post Jul 5 2012, 07:25 PM
Post #236


Senior Member
****

Group: Members
Posts: 3979
Joined: 17-January 05
Member No.: 152



Thanks for that solar compilation, Paolo. There should be several transits visible, but I haven't inspected each of the 4779 frames yet!

Back to what Oppy's up to now, here's a pancam anaglyph showing the "mini-notch" to our NE:
Attached Image

It looks like a fair bit of relief, which bodes well for relief at the real notch (Whim Creek).
Go to the top of the page
 
+Quote Post
fredk
post Jul 5 2012, 07:30 PM
Post #237


Senior Member
****

Group: Members
Posts: 3979
Joined: 17-January 05
Member No.: 152



QUOTE (RoverDriver @ Jul 5 2012, 08:24 PM) *
OK, I will see what I can do.

Hey, wait a minute, don't you have a rover to drive? laugh.gif wink.gif
Go to the top of the page
 
+Quote Post
RoverDriver
post Jul 5 2012, 07:48 PM
Post #238


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



QUOTE (fredk @ Jul 5 2012, 11:30 AM) *
Hey, wait a minute, don't you have a rover to drive? laugh.gif wink.gif


I wish, my next shift is on 7/18! I had some spare time while waiting for one more simulation to complete, so I gathered the data and used whirlgif to generate the animation.

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
RoverDriver
post Jul 5 2012, 11:27 PM
Post #239


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



This is an animation of 747 frames that are separated by a bit more than 1 Sol. The variation in size of the Sun is now clearly visible.

Attached Image

Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post
RoverDriver
post Jul 6 2012, 12:04 AM
Post #240


Member
***

Group: Admin
Posts: 974
Joined: 29-September 06
From: Pasadena, CA - USA
Member No.: 1200



OK, more fun with the tau images. For each of the tau images I binarized the images (fixed threshold @127) and counted the white pixels, finally, from the area I computed teh diameter. The attached plot shows the variation of Sun diameter vs Sol. Pretty crude and it shows, but it gives an idea of the variation.

Attached Image


Paolo


--------------------
Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
Go to the top of the page
 
+Quote Post

35 Pages V  « < 14 15 16 17 18 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 6th August 2020 - 10:32 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 a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.