[X] My Assistant

[Decepticon]

Another flyby coming soon. Interesting observations include radar swath of Huygens landing site.

Just before CA. http://space.jpl.nasa.gov/cgi-bin/wspace?t...porbs=1&brite=1

From above... http://space.jpl.nasa.gov/cgi-bin/wspace?t...porbs=1&brite=1

I really missed VP encounter updates So I tried my best at showing the Hemisphere to be imaged during the flyby.

[elakdawalla]

OK, what the heck is going on with the longitudes in these maps?

Maybe it's too early in the morning for me to be thinking hard but I think there are errors in the longitudes on both the imaging coverage and the RADAR maps. Can somebody please check and tell me if I'm right about that?

I think the imaging coverage map is centered at 180 degrees, but it is labeled as 0 degrees.

I think that the third RADAR globe, the one that shows the T8 swath, has a "120" where it should have a "240."

Am I crazy? They switch their convention all the time, using 180 sometimes and 0 sometimes as the center longitude, but I don't think I've noticed errors before.

--Emily

[JRehling]

OK, what the heck is going on with the longitudes in these maps?

Maybe it's too early in the morning for me to be thinking hard but I think there are errors in the longitudes on both the imaging coverage and the RADAR maps.  Can somebody please check and tell me if I'm right about that?
--Emily

You're definitely right. Look at Photojournal. The Radar releases and the T8 preview maps are almost consecutive image listings. Xanadu and Mezzoramia are clearly seen on both maps, and it looks like they either goofed the Radar map by 180 degrees, or maybe made even more serious goofs. Hope they rectify this and withdraw the mislabeled images.

http://photojournal.jpl.nasa.gov/targetFamily/Saturn

[volcanopele]

You're definitely right. Look at Photojournal. The Radar releases and the T8 preview maps are almost consecutive image listings. Xanadu and Mezzoramia are clearly seen on both maps, and it looks like they either goofed the Radar map by 180 degrees, or maybe made even more serious goofs. Hope they rectify this and withdraw the mislabeled images.

http://photojournal.jpl.nasa.gov/targetFamily/Saturn

No, we messed up. The last four flyby maps have all been centered at 0 West since that is where most of the coverage is and this is the first flyby since February to switch back to the Shangri-la side. I didn't catch the error till three hours before the image went live The map is centered on 180 West, regardless of the labels... grrr...

I'm talking about the ISS coverage map. Haven't looked at the RADAR coverage map to closely yet. Why didn't they ask us if they could use our base map?

[elakdawalla]

No, we messed up.  The last four flyby maps have all been centered at 0 West since that is where most of the coverage is and this is the first flyby since February to switch back to the Shangri-la side.  I didn't catch the error till three hours before the image went live   The map is centered on 180 West, regardless of the labels...  grrr...

I'm talking about the ISS coverage map.  Haven't looked at the RADAR coverage map to closely yet.  Why didn't they ask us if they could use our base map?

Glad to hear I'm not crazy. I've heard back from the RADAR team that that is a typo too, it should be 240.

I get so confused trying to figure out what's what in these maps (leading? trailing?) - and I forget so often that the ISS maps are truncated just above 60 degrees North -- that I've started to doctor all the maps that I use on our website so that they show a consistent point of view -- centered at 180 and (for now) truncated just above 60 N. I just did the same for the recent RADAR map -- makes it easier to compare where the coverage was. (I also corrected the ISS map longitude while I was at it.)



As for why they didn't use the ISS base map, Rosaly Lopes told me that they wanted to make it more obvious where the RADAR coverage had gotten to so far. I am looking forward to seeing more and more of that blue background getting covered up over the course of the mission.

--Emily