Make a simple mosaic - Revision history

Rebull at 19:08, 13 May 2011

2011-05-13T19:08:54Z

Rebull at 19:07, 13 May 2011

2011-05-13T19:07:47Z

Rebull at 14:46, 2 July 2008

2008-07-02T14:46:45Z

Rebull at 21:56, 27 March 2008

2008-03-27T21:56:42Z

Rebull at 18:36, 15 March 2008

2008-03-15T18:36:42Z

Rebull at 17:25, 15 March 2008

2008-03-15T17:25:47Z

Rebull at 16:04, 15 March 2008

2008-03-15T16:04:26Z

Rebull at 16:03, 15 March 2008

2008-03-15T16:03:49Z

Rebull at 23:03, 11 March 2008

2008-03-11T23:03:32Z

Rebull at 23:00, 11 March 2008

2008-03-11T23:00:32Z

← Older revision		Revision as of 19:08, 13 May 2011
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−	Step 0. Make a directory called something useful, like "orion." Put all the zip files that ~~Leopard~~ gives you in there. Unzip them. After you unzip all the files that ~~Leopard downloads~~, you will have several directories on your disk, each of which is labeled by the letter "r" followed by a 7-digit number. This 7-digit number is the AORKEY, e.g., a unique identifier for that observation. For my example, I downloaded all four channels of the post-BCD data from program 43, but nothing from any other program. I have nine directories: r4097792, r4098048, r4098304, r4098560, r4099840, r4100096, r4100352, r4100608, and r4182528.	+	Step 0. Make a directory called something useful, like "orion." Put all the zip files that the SHA gives you in there. Unzip them. After you unzip all the files that you have downloaded, you will have several directories on your disk, each of which is labeled by the letter "r" followed by a 7-digit number. This 7-digit number is the AORKEY, e.g., a unique identifier for that observation. For my example, I downloaded all four channels of the post-BCD data from program 43, but nothing from any other program. I have nine directories: r4097792, r4098048, r4098304, r4098560, r4099840, r4100096, r4100352, r4100608, and r4182528.

← Older revision		Revision as of 19:07, 13 May 2011
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−	OK, you've ~~[[What_should_I_do_if_there_is_more_than_one_mosaic_of_the_same_object%3F\|~~downloaded more than one post-BCD mosaic of your target]], in this example, the Orion Nebula Cluster. How can you combine them into one mosaic?	+	OK, you've downloaded more than one post-BCD mosaic of your target, in this example, the Orion Nebula Cluster. How can you combine them into one mosaic?

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 . If you need to, go and grab [http://ssc.spitzer.caltech.edu/postbcd/download-mopex.html the MOPEX software for your platform], follow the directions, install it, and start it up.  Make sure that, under the "Options" menu, the option "Use Automatic Version Update" is selected.  If this is the first time you have installed MOPEX, you will probably have to wait a few seconds, and then MOPEX will say that there is a new version of the software available.  Let it go and grab the new version and restart.
-''Note: From here forward, we are assuming you are on a unix-based (unix, linux, mac) machine, which is recommended not just for the tricks and things below, but also for speed and reliability.  There is a separate page with [[hints and tips for using MOPEX on windows]].''
+''Note: From here forward, we are assuming you are on a unix-based (unix, linux, mac) machine, which is recommended not just for the tricks and things below, but also for speed and reliability.  There is a separate page with [[hints and tips for using MOPEX on windows]].  Also see [[Unix cheatsheet]] for a list of common commands.''
 . Create (plain text) lists of files for MOPEX to use.  As described above, it needs at least the main data (*maic.fits) and the errors (*munc.fits).  On a linux machine or from a Mac terminal window, you can get these lists as follows.  cd into your 'useful' directory (called "orion" above) where you unpacked all the data.  Then do this:

← Older revision		Revision as of 21:56, 27 March 2008
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	ls r/ch4/pbcd/munc.fits > ch4err.txt		ls r/ch4/pbcd/munc.fits > ch4err.txt

−	Each one of these lists now contains one filename per line, for more than 230 lines per channel.	+	Each one of these lists now contains one filename per line, for more than 230 lines per channel for the Orion example. If you picked another region, you might have just a few files here.

← Older revision		Revision as of 18:36, 15 March 2008
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−	Step 0. Make a directory called something useful, like "orion." Put all the zip files that Leopard gives you in there. Unzip them. After you unzip all the files that Leopard downloads, you will have several directories on your disk, each of which is labeled by the letter "r" followed by a 7-digit number. This 7-digit number is the AORKEY, e.g., a unique ~~identified~~ for that observation. For my example, I downloaded all four channels of the post-BCD data from program 43, but nothing from any other program. I have nine directories: r4097792, r4098048, r4098304, r4098560, r4099840, r4100096, r4100352, r4100608, and r4182528.	+	Step 0. Make a directory called something useful, like "orion." Put all the zip files that Leopard gives you in there. Unzip them. After you unzip all the files that Leopard downloads, you will have several directories on your disk, each of which is labeled by the letter "r" followed by a 7-digit number. This 7-digit number is the AORKEY, e.g., a unique identifier for that observation. For my example, I downloaded all four channels of the post-BCD data from program 43, but nothing from any other program. I have nine directories: r4097792, r4098048, r4098304, r4098560, r4099840, r4100096, r4100352, r4100608, and r4182528.

@@ Line 2: / Line 2: @@
-Step 0. Make a directory called something useful, like "orion."  Put all the zip files that Leopard gives you in there.  Unzip them.   After you unzip all the files that Leopard downloads, you will have several directories on your disk, each of which is labeled by the letter "r" followed by a 7-digit number.  For my example, I downloaded all four channels of the post-BCD data from program 43, but nothing from any other program.  I have nine directories: r4097792, r4098048, r4098304, r4098560, r4099840, r4100096, r4100352, r4100608, and r4182528.
+Step 0. Make a directory called something useful, like "orion."  Put all the zip files that Leopard gives you in there.  Unzip them.   After you unzip all the files that Leopard downloads, you will have several directories on your disk, each of which is labeled by the letter "r" followed by a 7-digit number.  This 7-digit number is the AORKEY, e.g., a unique identified for that observation.  For my example, I downloaded all four channels of the post-BCD data from program 43, but nothing from any other program.  I have nine directories: r4097792, r4098048, r4098304, r4098560, r4099840, r4100096, r4100352, r4100608, and r4182528.
@@ Line 11: / Line 11: @@
 ''Note: From here forward, we are assuming you are on a unix-based (unix, linux, mac) machine, which is recommended not just for the tricks and things below, but also for speed and reliability.  There is a separate page with [[hints and tips for using MOPEX on windows]].''
-. Create lists of files for MOPEX to use.  As described above, it needs at least the main data (*maic.fits) and the errors (*munc.fits).  On a linux machine or from a Mac terminal window, you can get these lists as follows.  cd into your 'useful' directory (called "orion" above) where you unpacked all the data.  Then do this:
+. Create (plain text) lists of files for MOPEX to use.  As described above, it needs at least the main data (*maic.fits) and the errors (*munc.fits).  On a linux machine or from a Mac terminal window, you can get these lists as follows.  cd into your 'useful' directory (called "orion" above) where you unpacked all the data.  Then do this:
   ls r*/ch1/pbcd/*maic.fits > ch1mos.txt

← Older revision		Revision as of 16:03, 15 March 2008
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	1. If you need to, go and grab [http://ssc.spitzer.caltech.edu/postbcd/download-mopex.html the MOPEX software for your platform], follow the directions, install it, and start it up. Make sure that, under the "Options" menu, the option "Use Automatic Version Update" is selected. If this is the first time you have installed MOPEX, you will probably have to wait a few seconds, and then MOPEX will say that there is a new version of the software available. Let it go and grab the new version and restart.		1. If you need to, go and grab [http://ssc.spitzer.caltech.edu/postbcd/download-mopex.html the MOPEX software for your platform], follow the directions, install it, and start it up. Make sure that, under the "Options" menu, the option "Use Automatic Version Update" is selected. If this is the first time you have installed MOPEX, you will probably have to wait a few seconds, and then MOPEX will say that there is a new version of the software available. Let it go and grab the new version and restart.

		+	''Note: From here forward, we are assuming you are on a unix-based (unix, linux, mac) machine. There is a separate page with [[hints and tips for using mopex on windows]].''

	2. Create lists of files for MOPEX to use. As described above, it needs at least the main data (maic.fits) and the errors (munc.fits). On a linux machine or from a Mac terminal window, you can get these lists as follows. cd into your 'useful' directory (called "orion" above) where you unpacked all the data. Then do this:		2. Create lists of files for MOPEX to use. As described above, it needs at least the main data (maic.fits) and the errors (munc.fits). On a linux machine or from a Mac terminal window, you can get these lists as follows. cd into your 'useful' directory (called "orion" above) where you unpacked all the data. Then do this:

← Older revision		Revision as of 23:03, 11 March 2008
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	[[image:cg4nooverlap.png]]		[[image:cg4nooverlap.png]]

−	If your mosaic looks like this, you will probably need to [[I%27m_ready_to_advance_to_a_highly_technical_and_in-depth_discussion_on_downloading_Spitzer_data.\|start from the individual BCDs]].	+	Note that there is a black-background part of the mosaic at the top, and then you can see the higher-background individual frames from the newer mosaic on the bottom. If your mosaic looks like this, you will probably need to [[I%27m_ready_to_advance_to_a_highly_technical_and_in-depth_discussion_on_downloading_Spitzer_data.\|start from the individual BCDs]].

← Older revision		Revision as of 23:00, 11 March 2008
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	10. Repeat as necessary for other channels, other observations....		10. Repeat as necessary for other channels, other observations....
		+
		+	11. Note that if you are combining data taken at wildly different times during the mission, '''Spitzer moves'''. It moves through a clump of dust that is trailing the Earth. So that clump of dust changes the background level a LOT. Depending on what channel you are combining, and the time span between images, you might not notice a change in the background. BUT, here is an example of an observation where the backgrounds are wildly different between various pieces of the mosaic.
		+
		+	[[image:cg4nooverlap.png]]
		+
		+	If your mosaic looks like this, you will probably need to [[I%27m_ready_to_advance_to_a_highly_technical_and_in-depth_discussion_on_downloading_Spitzer_data.\|start from the individual BCDs]].