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Venus Express
tedstryk
post Apr 12 2005, 06:56 PM
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If all goes well, Venus Express will be a major topic for discussion in this forum a year from now. Does anyone know how good the surface coverage will be from VIRTIS and VMC? My understanding is that VIRTIS will obtain low resolution multispectral maps, and that VMC will, in addition to cloud monitoring, have one channel that can see the surface, but I don't know at what resolution or at what quality. It will be nice to have some non-radar images of Venus' surface besides the Venera snapshots and the shadowy images from Earth and Galileo's NIMS.

Ted


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Guest_BruceMoomaw_*
post Apr 20 2005, 10:31 AM
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See my new note on the "Radar on Venus Express?" thread, Ted. I may be able to get you some more precise resolutional data later on if I can find the time. (However, VMC -- unlike VIRTIS -- cannot see the surface; it's entirely for UV cloud top patterns.)
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tedstryk
post Apr 21 2005, 03:16 AM
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Actually, VMC will have some limited capabliity to detect the surface. My source on this is the ESA mission documentation. See below:

3.7 VMC (Venus Monitoring Camera)
Precursors. Imaging of the Venus disc at different wavelength was carried out by the Pioneer Venus orbiter, during the fly-bys of Mariner-10 and Galileo, and from the ground. These data was used to study the atmospheric dynamics at the cloud tops (UV), to investigate the thermospheric dynamics (UV, visible, and near-IR airglow), to map the surface brightness and to study cloud opacity variations (near-IR). However, these observations lacked global spatial and temporal coverage as well as spatial resolution. At the same time they demonstrated the power of the global imaging in the study of dynamical processes in the Venus atmosphere.
VMC/Mars Express. The Video Monitoring Camera (VMC) onboard the Mars Express is a monochrome wide-angle CCD camera that was designed to take the video sequence of Beagle-2 lander leaving the Mars Express spacecraft at Mars.
VMC/Venus Express. The Study Team has recommended to modify the Mars Express camera into a wide-angle multi-channel Venus Monitoring Camera. The modification will consist of adding several narrow band filters in the UV, visible, and near-IR spectral ranges that would allow the camera to provide support imaging for the whole mission, achieve additional science goals, and contribute to the public outreach programme. Preliminary study showed that the modification of VMC will not specify additional requirements to the Mars Express bus and will be fully compatible with spacecraft interfaces. More detailed elaboration of the technical, programmatic, and financial issues related to the VMC modification and accommodation on the spacecraft will be done by the VMC team, Astrium, and ESA during the pre-Phase B study in the beginning of 2002 if the mission is approved. The modified VMC will be prepared in parallel with available VMC/Mars Express in order not to jeopardize the schedule of the mission. In case of failure to modify VMC in time VIRTIS will be able to cover significant part of the VMC goals so that the achieving of the mission objectives would be secured.
The VMC camera will be capable of achieving scientific goals in atmospheric dynamics and surface studies by means of global multi-channel imaging. An example of UV image expected from VMC at Venus is shown in Figure 2.2. Sequence of such images would allow one to visualize the motions of the cloud tops and to study the general circulation and wave phenomena at the altitude of ~70 km. Images of the Venus disc taken every 30 min will be used to create movies of the cloud motions and propagating waves that would be extremely valuable for investigation of the atmospheric dynamics. Figure 2.6 shows an example of image that VMC will take in the visible at night. The monitoring of airglow patterns that originate at 90-110 km is an efficient tool to study the dynamics of the Venus upper atmosphere. The VMC observations in the 1 m transparency “window” will give the images similar to those shown in Figures 2.5 and 2.9. These images have two types of features. Some of them belong to the surface and result from the temperature and emissivity variations. Second type of markings originates in the main cloud deck and indicates cloud opacity variations. The movies based on such imaging will be used to study global atmospheric dynamics at ~50km.
To summarize, VMC will fulfill the following scientific goals:
• Support imaging, i.e. global imaging context for the whole mission;
• Observations of the global cloud motions in the UV and near-IR spectral ranges;
• Study of distribution of the unknown UV absorber at the cloud tops;
• Monitoring the UV and visible airglow and its variability as dynamical tracer;
• Mapping the surface brightness temperature distribution and search for volcanic activity.
Besides important scientific goals the VMC imaging and movies will significantly contribute to the public outreach programme.


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Posts in this topic
- tedstryk   Venus Express   Apr 12 2005, 06:56 PM
- - BruceMoomaw   See my new note on the "Radar on Venus Expres...   Apr 20 2005, 10:31 AM
|- - tedstryk   Actually, VMC will have some limited capabliity to...   Apr 21 2005, 03:16 AM
- - BruceMoomaw   You've caught me -- I was completely unaware o...   Apr 21 2005, 05:34 AM
- - Mode5   To the powers that be, thank you for creating this...   Apr 21 2005, 05:53 AM
- - Gsnorgathon   Ted - do you have a link for the ESA mission doc(s...   Apr 21 2005, 07:08 AM
|- - tedstryk   http://megasn.obspm.fr/VEX_MDR51.doc It is a bit ...   Apr 21 2005, 09:17 AM
- - djellison   I wonder if the effects of looking thru narrow spe...   Apr 21 2005, 09:26 AM
- - tedstryk   Hard to tell. It is sort of like Pre-Cassini Tita...   Apr 21 2005, 09:51 AM
|- - Richard Trigaux   QUOTE (tedstryk @ Apr 21 2005, 09:51 AM)It is...   Jun 26 2005, 08:06 AM
- - BruceMoomaw   I can dig up some stuff on this for you, given a l...   Jun 23 2005, 12:06 AM
- - remcook   I believe the spectral 'windows' are much ...   Jun 25 2005, 08:28 PM
- - edstrick   My understanding is that the topographically relat...   Jun 26 2005, 07:02 AM
- - edstrick   On Cassin, the VIMS is the best instrument we coul...   Jun 26 2005, 10:31 AM
|- - Bob Shaw   QUOTE (edstrick @ Jun 26 2005, 11:31 AM)On Ca...   Jul 8 2005, 01:59 PM
|- - JRehling   QUOTE (edstrick @ Jun 26 2005, 03:31 AM)On Ca...   Jul 8 2005, 02:23 PM
|- - Gsnorgathon   I suppose it's possible, if not easy, to subtr...   Jul 9 2005, 04:10 AM
|- - JRehling   QUOTE (Gsnorgathon @ Jul 8 2005, 09:10 PM)I s...   Jul 9 2005, 05:09 AM
- - maycm   An update....though not much new information. htt...   Jul 8 2005, 12:49 PM
- - TheChemist   Venus Express arrives in Baikonur She's got i...   Aug 10 2005, 04:33 PM
|- - Bob Shaw   QUOTE (TheChemist @ Aug 10 2005, 05:33 PM)Ven...   Aug 10 2005, 07:42 PM
- - BruceMoomaw   Here's my long-promised entry on whatever I...   Aug 29 2005, 02:10 AM
- - BruceMoomaw   Two more notes: (1) The VIRTIS team is fully re...   Aug 29 2005, 02:15 AM
- - tedstryk   http://messenger.jhuapl.edu/the_mission/im...ine_f...   Sep 11 2005, 01:35 PM
|- - 4th rock from the sun   QUOTE (tedstryk @ Sep 11 2005, 02:35 PM)... ...   Sep 12 2005, 08:46 PM
|- - tedstryk   Well, I doubt there would be time-lapse images. T...   Sep 12 2005, 09:59 PM
- - mike   America will just have to make a new probe that re...   Sep 12 2005, 07:08 PM
|- - Bob Shaw   QUOTE (mike @ Sep 12 2005, 08:08 PM)America w...   Sep 12 2005, 09:04 PM
- - TheChemist   QUOTE Oh, and the thing that the ESA Press Office ...   Sep 13 2005, 11:52 AM
|- - tedstryk   QUOTE (TheChemist @ Sep 13 2005, 11:52 AM)...   Sep 13 2005, 03:01 PM
- - RNeuhaus   New update. Now it is less than 14 days from launc...   Oct 12 2005, 04:09 AM
|- - ljk4-1   Preparations for ESA's Venus Express mission p...   Oct 13 2005, 01:50 PM
- - RNeuhaus   The spacecraft Technical details Spacecraft fact...   Oct 13 2005, 02:45 PM
|- - um3k   QUOTE (RNeuhaus @ Oct 13 2005, 10:45 AM)The p...   Oct 13 2005, 03:03 PM
||- - Rakhir   QUOTE (um3k @ Oct 13 2005, 05:03 PM)I'm n...   Oct 14 2005, 08:23 AM
|- - Rakhir   QUOTE (RNeuhaus @ Oct 13 2005, 04:45 PM)The s...   Oct 13 2005, 04:03 PM
|- - RNeuhaus   QUOTE (Rakhir @ Oct 13 2005, 11:03 AM)From ht...   Oct 13 2005, 04:46 PM
|- - tedstryk   QUOTE (RNeuhaus @ Oct 13 2005, 04:46 PM)Thank...   Oct 13 2005, 05:06 PM
|- - ugordan   QUOTE (RNeuhaus @ Oct 13 2005, 06:46 PM)Thank...   Oct 13 2005, 05:09 PM
- - RNeuhaus   The problem was already solved by changing the pro...   Oct 13 2005, 06:25 PM
- - Jeff7   QUOTE (um3k @ Oct 13 2005, 10:03 AM)I'm n...   Oct 14 2005, 04:22 AM
|- - helvick   QUOTE (Jeff7 @ Oct 14 2005, 05:22 AM)I think ...   Oct 14 2005, 08:15 AM
|- - RNeuhaus   QUOTE (Jeff7 @ Oct 13 2005, 11:22 PM)I think ...   Oct 14 2005, 03:59 PM
- - RNeuhaus   According to the VE's pdf document, VE has gre...   Oct 14 2005, 04:22 PM
- - dvandorn   Your diagram shows the most common Hohmann transfe...   Oct 15 2005, 08:59 AM
- - Rakhir   Fairing Installation Today, Monday 17 October 200...   Oct 17 2005, 08:25 PM
- - RNeuhaus   New updates about Venus Express. More details abou...   Oct 19 2005, 10:30 PM
- - Rakhir   New ESA update : summary of the launch, cruise and...   Oct 21 2005, 11:03 AM
- - Adam   Delayed: http://www.esa.int/esaCP/SEM0CV3J2FE_ind...   Oct 21 2005, 06:31 PM
- - Rakhir   Venus Express preliminary investigations bring enc...   Oct 25 2005, 11:33 AM
- - SigurRosFan   Spaceflightnow Mission Status Center: Venus Expres...   Oct 26 2005, 01:27 PM
- - Rakhir   Russian space officials Monday set a Nov. 9 blasto...   Oct 31 2005, 05:21 PM
- - RNeuhaus   Strange news. The postpone of the launch was due...   Oct 31 2005, 09:23 PM
|- - Rakhir   QUOTE (RNeuhaus @ Oct 31 2005, 11:23 PM)Stran...   Oct 31 2005, 10:24 PM
- - Rakhir   Roll Out to Launch Pad http://sci.esa.int/science...   Nov 5 2005, 04:42 PM
- - Rakhir   Pre-launch sequence was executed. 2 days... http:...   Nov 6 2005, 11:24 PM
- - paulanderson   Interesting article: 'Venus Mission May Hold ...   Nov 7 2005, 01:35 AM
- - mike   If Venus is almost exactly like Earth, but much ho...   Nov 7 2005, 03:04 AM
|- - JRehling   QUOTE (mike @ Nov 6 2005, 08:04 PM)If Venus i...   Nov 7 2005, 03:41 PM
- - RNeuhaus   Besides, the other intrigating thing is that Venus...   Nov 7 2005, 03:54 PM
|- - ljk4-1   QUOTE (RNeuhaus @ Nov 7 2005, 10:54 AM)Beside...   Nov 7 2005, 04:03 PM
|- - RNeuhaus   QUOTE (ljk4-1 @ Nov 7 2005, 11:03 AM)A w...   Nov 7 2005, 04:26 PM
|- - ljk4-1   QUOTE (RNeuhaus @ Nov 7 2005, 11:26 AM)Intere...   Nov 7 2005, 04:30 PM
|- - JRehling   QUOTE (ljk4-1 @ Nov 7 2005, 09:30 AM)Act...   Nov 7 2005, 05:26 PM
|- - The Messenger   QUOTE (JRehling @ Nov 7 2005, 10:26 AM)There ...   Nov 7 2005, 05:46 PM
|- - ljk4-1   QUOTE (JRehling @ Nov 7 2005, 12:26 PM)There ...   Nov 7 2005, 10:08 PM
|- - imran   Less than one hour from launch! Live webcast ...   Nov 9 2005, 02:41 AM
||- - jamescanvin   QUOTE (imran @ Nov 9 2005, 01:41 PM)Less than...   Nov 9 2005, 03:11 AM
||- - imran   Both webcasts are working now although you get bet...   Nov 9 2005, 03:22 AM
||- - imran   0327 GMT (10:27 p.m. EDT Tues.) The Venus Express...   Nov 9 2005, 03:30 AM
|||- - imran   QUOTE (imran @ Nov 9 2005, 03:30 AM)0327 GMT ...   Nov 9 2005, 03:32 AM
||- - jamescanvin   QUOTE (imran @ Nov 9 2005, 02:22 PM)Both webc...   Nov 9 2005, 03:33 AM
||- - imran   QUOTE (jamescanvin @ Nov 9 2005, 03:33 AM)Sta...   Nov 9 2005, 03:33 AM
||- - jamescanvin   QUOTE (imran @ Nov 9 2005, 02:33 PM)LIFTOFF...   Nov 9 2005, 03:38 AM
|||- - jamescanvin   QUOTE (jamescanvin @ Nov 9 2005, 02:38 PM)OK ...   Nov 9 2005, 03:39 AM
||- - imran   0336 GMT (10:36 p.m. EDT Tues.) T+plus 3 minutes....   Nov 9 2005, 03:38 AM
|- - JRehling   QUOTE (ljk4-1 @ Nov 7 2005, 03:08 PM)The...   Nov 9 2005, 06:12 AM
- - djellison   Moons tend to orbit their parent planet in the sam...   Nov 7 2005, 04:57 PM
- - BruceMoomaw   Well, as Chesterton said, the most remarkable thin...   Nov 7 2005, 09:20 PM
- - RNeuhaus   Anyway, at the beginning of the planetary formatio...   Nov 7 2005, 09:57 PM
- - Waspie_Dwarf   Alternative link for the live webcast of the launc...   Nov 9 2005, 03:06 AM
|- - jamescanvin   QUOTE (Waspie_Dwarf @ Nov 9 2005, 02:06 PM)Al...   Nov 9 2005, 03:14 AM
- - Waspie_Dwarf   The live feed won't start until 03:28 GMT, at ...   Nov 9 2005, 03:14 AM
- - imran   Cutoff of 3rd stage and separation of nose module.   Nov 9 2005, 03:41 AM
|- - jamescanvin   QUOTE (imran @ Nov 9 2005, 02:41 PM)"Eve...   Nov 9 2005, 03:42 AM
|- - imran   QUOTE (jamescanvin @ Nov 9 2005, 03:42 AM)Thi...   Nov 9 2005, 03:43 AM
|- - imran   There goes the feed. Oh well..guess I'll have...   Nov 9 2005, 03:46 AM
|- - imran   0348 GMT (10:48 p.m. EDT Tues.) T+plus 15 minutes...   Nov 9 2005, 03:51 AM
- - elakdawalla   Argh! Is that second Fregat burn happening or...   Nov 9 2005, 05:02 AM
|- - jamescanvin   From Spaceflightnow.com 0514 GMT (12:14 a.m. EST)...   Nov 9 2005, 05:16 AM
|- - Bricktop   From http://sci.esa.int/science-e/www/object/in......   Nov 9 2005, 05:19 AM
- - jamescanvin   Fregat burn should be underway by now. No word on...   Nov 9 2005, 05:06 AM
- - Waspie_Dwarf   QUOTE (jamescanvin @ Nov 9 2005, 05:16 AM)Fro...   Nov 9 2005, 05:20 AM
- - Rakhir   From http://sci.esa.int/science-e/www/object/in......   Nov 9 2005, 05:20 AM
- - Waspie_Dwarf   QUOTE (Bricktop @ Nov 9 2005, 05:19 AM)From h...   Nov 9 2005, 05:22 AM
- - jamescanvin   Hurrrah! Venus here we come   Nov 9 2005, 05:25 AM
- - elakdawalla   This from Daniel Fischer: "Just to report tha...   Nov 9 2005, 05:48 AM
- - Rakhir   MET: +02h 40m Sun acquisiton and successfully depl...   Nov 9 2005, 06:17 AM
- - Decepticon   QUOTE Venus Orbit Insertion on April 11, 2006....   Nov 9 2005, 07:03 AM
- - edstrick   "Sun acquisiton and successfully deployment o...   Nov 9 2005, 07:06 AM
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