Difference between revisions of "March 27, 2004"

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=LTO=
 
=LTO=
 
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      <td width="50%"><h2 align="left">LTO</h2></td>
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  <td width="50%"><h2 align="right">March 27, 2004</h2></td>
 
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<td colspan="2"><div align="center">
<IMG SRC="images/LPOD-2004-03-27.jpg" NAME="main_image" width="847" height="700" border="0"></div>
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[[File:LPOD-2004-03-27.jpg|LPOD-2004-03-27.jpg]]</div>
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      <td><div align="center" span class="main_sm">Image Credit:  <a class="one" HREF="http://www.lpi.usra.edu/library/img_collection.shtml#moon">Lunar & Planetary Institute Map Collection</A></div></td>
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<td><div align="center" span class="main_sm">Image Credit:  [http://www.lpi.usra.edu/library/img_collection.shtml#moon Lunar & Planetary Institute Map Collection]</div></td>
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td>
 
<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td>
 
+
<p class="story" align="center"><b>LTO </b></p>
  <p class="story" align="center"><b>LTO </b></p>
+
<p class="story" align="left">        Lunar Topographic Orthophotomosaic. That mouthful explains the widespread use of the abbreviation LTO for the  
 
+
best topo images ever made for the Moon. Derived from stereo images taken from Apollo orbiting command modules,  
  <p class="story" align="left">        Lunar Topographic Orthophotomosaic. That mouthful explains the widespread use of the abbreviation LTO for the  
+
more than 250 LTOs were produced covering much of the landscape under the flight paths of Apollo 15, 16 and 17.  
        best topo images ever made for the Moon. Derived from stereo images taken from Apollo orbiting command modules,  
+
This particular image shows a portion of LTO 39B2 of western Mare Imbrium. The 25 km wide crater Delisle is on  
        more than 250 LTOs were produced covering much of the landscape under the flight paths of Apollo 15, 16 and 17.  
+
the left and Diophantus B is on the right. This map has a scale of 1:250,000 and a contour interval of 100 m.  
        This particular image shows a portion of LTO 39B2 of western Mare Imbrium. The 25 km wide crater Delisle is on  
+
Diophantus B has a diameter of 6.1 km, and by reading the spot heights on its rim (5665 m) and floor (4546 m),  
        the left and Diophantus B is on the right. This map has a scale of 1:250,000 and a contour interval of 100 m.  
+
its depth of 1,119 m is accurately obtained. Thus, this fresh little simple crater has a depth to diameter (d/D)  
        Diophantus B has a diameter of 6.1 km, and by reading the spot heights on its rim (5665 m) and floor (4546 m),  
+
ratio of about 1/5 - the crater's depth is 1/5th its width. This is typical of small fresh craters; larger ones  
        its depth of 1,119 m is accurately obtained. Thus, this fresh little simple crater has a depth to diameter (d/D)  
+
such as Tycho have a d/D value of about 1/18, and a basin such as Orientale is roughly 1/100. There are arguments  
        ratio of about 1/5 - the crater's depth is 1/5th its width. This is typical of small fresh craters; larger ones  
+
about how deep a crater/basin is when first excavated - the transient cavity - but modification of this initial  
        such as Tycho have a d/D value of about 1/18, and a basin such as Orientale is roughly 1/100. There are arguments  
+
hole shallows the final crater. Modification is by wall slumps and terraces, floor rebound, and maybe for basins,  
        about how deep a crater/basin is when first excavated - the transient cavity - but modification of this initial  
+
isostatic adjustment. We need LTOs for the entire Moon - and they need to be available online.  
        hole shallows the final crater. Modification is by wall slumps and terraces, floor rebound, and maybe for basins,  
+
</p>
        isostatic adjustment. We need LTOs for the entire Moon - and they need to be available online.  
+
<p class="story"><b>Related Links:</b><br>
</p>
+
[http://astrogeology.usgs.gov/Projects/MapBook/series_nf.html USGS Planetary Map Index]<br>
 
+
[http://www.hq.nasa.gov/office/pao/History/SP-362/ch1.htm Apollo Over the Moon - camera info]</p>
  <p class"story"><b>Related Links:</b><br>
+
<p class="story"> <b>Tomorrow's LPOD:</b> A Quadrant of Elger</p>
 
+
</td></tr>
                [http://astrogeology.usgs.gov/Projects/MapBook/series_nf.html USGS Planetary Map Index]<br>
 
                [http://www.hq.nasa.gov/office/pao/History/SP-362/ch1.htm Apollo Over the Moon - camera info]</p>
 
 
 
  <p class"story"> <b>Tomorrow's LPOD:</b> A Quadrant of Elger</p>
 
 
 
  <p><img src="../../../MainPage/spacer.gif" width="640" height="1"></p>
 
  </td></tr>
 
 
</table>
 
</table>
 
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</td></tr>
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<table width="100%"  border="0" cellspacing="2" cellpadding="4">
 
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<tr>
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<td><hr></td>
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</tr>
 
<tr>
 
<tr>
  <td colspan="2" rowspan="1">
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<td>
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<p align="center" class="main_titles"><b>Author & Editor:</b><br>
  <table width="100%"  border="0" cellspacing="2" cellpadding="4">
+
[mailto:tychocrater@yahoo.com Charles A. Wood]</p>
    <tr>
+
<p align="center" class="main_titles"><b>Technical Consultant:</b><br>
      <td><hr width="640"></td>
+
[mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
      </tr>
+
<p align="center" class="main_titles"><b>A service of:</b><br>
    <tr>
+
[http://www.observingthesky.org/ ObservingTheSky.Org]</p>
      <td>
+
<p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
  <p align="center" class="main_titles"><b>Author & Editor:</b><br>
+
[http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p></td>
      [mailto:chuck@observingthesky.org Charles A. Wood]</p>
+
</tr>
      <p align="center" class="main_titles"><b>Technical Consultant:</b><br>
 
      [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
 
      <p align="center" class="main_titles"><b>[mailto:webmaster@entropysponge.com Contact Webmaster]</b></p>
 
      <p align="center" class="main_titles"><b>A service of:</b><br>
 
      <a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a></p>
 
      <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
 
      <a class="one" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html">Astronomy</a> | <a class="one" href="http://www.msss.com/">Mars</a> | <a class="one" href="http://epod.usra.edu/">Earth</a></p></td>
 
      </tr>
 
 
</table>
 
</table>
 
 
 
 
<p>&nbsp;</p>
 
<p>&nbsp;</p>
 
 
 
 
----
 
----
 
===COMMENTS?===  
 
===COMMENTS?===  
 
Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment.
 
Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment.

Revision as of 18:17, 4 January 2015

LTO

LPOD-2004-03-27.jpg

LTO

Lunar Topographic Orthophotomosaic. That mouthful explains the widespread use of the abbreviation LTO for the best topo images ever made for the Moon. Derived from stereo images taken from Apollo orbiting command modules, more than 250 LTOs were produced covering much of the landscape under the flight paths of Apollo 15, 16 and 17. This particular image shows a portion of LTO 39B2 of western Mare Imbrium. The 25 km wide crater Delisle is on the left and Diophantus B is on the right. This map has a scale of 1:250,000 and a contour interval of 100 m. Diophantus B has a diameter of 6.1 km, and by reading the spot heights on its rim (5665 m) and floor (4546 m), its depth of 1,119 m is accurately obtained. Thus, this fresh little simple crater has a depth to diameter (d/D) ratio of about 1/5 - the crater's depth is 1/5th its width. This is typical of small fresh craters; larger ones such as Tycho have a d/D value of about 1/18, and a basin such as Orientale is roughly 1/100. There are arguments about how deep a crater/basin is when first excavated - the transient cavity - but modification of this initial hole shallows the final crater. Modification is by wall slumps and terraces, floor rebound, and maybe for basins, isostatic adjustment. We need LTOs for the entire Moon - and they need to be available online.

Related Links:
USGS Planetary Map Index
Apollo Over the Moon - camera info

Tomorrow's LPOD: A Quadrant of Elger


Author & Editor:
Charles A. Wood

Technical Consultant:
Anthony Ayiomamitis

A service of:
ObservingTheSky.Org

Visit these other PODs:
Astronomy | Mars | Earth

 


COMMENTS?

Click on this icon File:PostIcon.jpg at the upper right to post a comment.