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John Batchelor Hotel Mars with Dr. David Brain, Wednesday, 11-20-13 November 21, 2013

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John Batchelor Hotel Mars with Dr.  David Brain, Wednesday, 11-20-13

http://archived.thespaceshow.com/shows/2126-BWB-2013-11-20.mp3

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Guests: John Batchelor, Dr. David Brain, Dr. David Livingston:  Chinese lunar launch, the Chang’e 3 mission.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We do not permit the commercial use of any Space Show program or part thereof, nor do we permit Space Show programs to be edited, placed on YouTube, or other private channels & websites. Space Show programs can be quoted in news articles, papers, academic & research work but must be cited or referenced in the proper citation format. Contact Dr. Livingston for questions about our copyright and trademark policies which we do enforce.  This program is archived on The Space Show website, podcasting, and blog sites with permission from John Batchelor. Please visit the John Batchelor Show website for more information about this fine program, www.johnbatchelorshow.com.  Remember, your Amazon Purchases Can Help Support The Space Show/OGLF (www.onegiantleapfoundation.org/amazon.htm).

During our 11 minute plus discussion, John, David Brain, and I talked about the Maven mission from its recent launch to its orbital insertion at Mars in approximately ten months.  We talked about its trajectory course to Mars, its mission to answer questions about what happened to the water on Mars and in the Martian atmosphere, to find out if the water went up to space or down inside the planet or to the polar ice caps.  Dr. Brain was asked about the instrument package and sensors to better understand how Maven accomplishes its mission.  Another topic was the ten year mission for Maven as a relay communication satellite for rover data back to Earth but only a one year mission for the atmospheric studies.  We learned that if the scientists think it is warranted after the year is up, they can apply to extend the science mission.  We talked about the Indian Mars mission also on the way to Mars and arriving a few days past Maven’s arrival. 

Please post any comments/questions you might have on The Space Show blog.  You can contact any of  us through drspace@thespaceshow.com

 

Dan Adamo, Dr. Jim Logan, Dr. John Jurist, Tuesday, 11-19-13 November 19, 2013

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THE SPACE SHOW CLASSROOM

Dan Adamo, Dr. Jim Logan, Dr. John Jurist, Tuesday, 11-19-13

http://archived.thespaceshow.com/shows/2125-BWB-2013-11-19.mp3

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Guests:  Dan Adamo, Dr. Jim Logan, Dr. John Jurist.  Topics:  “Trajectory Challenges Faced By Orbiting Infrastructure Supporting Multiple Earth Departures For Mars.”  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See www.onegiantleapfoundation.org/amazon.htm.

Welcome to this special Space Show Classroom program with Dan Adamo, Dr. Logan, Dr. Jurist, and myself.  There was no break during this 2 hour 21 minute discussion which at times was very technical.  For those of you interested in missions to Mars, orbiting space infrastructure including depots, Earth & LEO departure points, mission and launch trades, payload issues and trades, radiation concerns, and more, you will find this discussion to be extremely informative and educational.  Guest Dan Adamo took us through the charts and graphs which you can access on either The Space Show Blog or The Space Show Classroom blog ((see http://thespaceshow.wordpress.com and http://spaceshowclassroom.wordpress.com).  Access the document ReuseForMars to follow the MP3 audio transcript. The other document on the blogs is a longer white paper version of the .pdf we used for last night’s discussion.  Dan introduced the topic to us, talked about his tangential work in this area at JSC last summer and the space community interest in orbiting infrastructure, especially fuel depots.  Dan then took us through the .pdf document discussing and explaining each chart and graph.  Rather than report on his page by page discussion, note that Jim, John, and I asked lots of questions per each chart and graph as did listeners by email and later in the discussion by phone.  Some of the main points and take aways from this discussion focused on inclination, launch location, penalties and advantages relating to orbiting infrastructure reuse for Earth departures to interplanetary destinations. For example, Russian launch sites are far to the north and will not be as efficient for Mars launches as sites to the south.  But as Doug discovered when he asked about equatorial launches, they benefit from a boost due to the inertial rotation of the Earth for higher initial launch speed, but otherwise there is no real benefit from the equatorial launch because minimum Earth orbit inclination is imposed by interplanetary geometry.  Another important point had to do with the reuse of orbital infrastructure.  As you will hear, it’s virtually worthless to reuse infrastructure in low Earth orbit to support Mars mission departure, including a depot, unless it can be repurposed for something else other than a Mars mission.  Don’t miss Dan’s explanation of this.  While we talked about Earth departure windows for Mars at two year intervals, we learned that not all these windows are equal.  Here, using the tables in Dan’s document, we were able to see just how unequal the Earth departure windows can be.  We talked a lot about Elliptical Earth Parking Orbit (EEPO) and the relationships with apogee and perigee for our payload departures for Mars.  Later, Dan outlined how we can “store” the cryo in the upperstage of our rocket as kinetic energy in the EEPO shortly after launch, a way to store the cryo energy without having to mitigate boiloff or transfer it between spacecraft.  Much was said about radiation and when you go through the trajectories and see them plotted as Dan has done, we learned that not all trajectories are equal as to radiation exposure.  Other important elements of our discussion that we focused on included the trans-Mars Injection (TMI) and asymptotic Earth departure velocity (v_infinity).  Listener Jimmy emailed us about another paper by a Goddard team that Dan was familiar with and he used some of their data and research.  Access their poster at www.lpi.usra.edu/sbag/science/NHATS_Accessible_NEAs_Summary.png (note you may need to cut & paste the URL in your browser).  As Dan & our Classroom panel went through charts, graphs, & tables, we applied the information to launches Earth departures in 2020 and 2022.  It was valuable to see how the constraints change, not always for the better either.  Note that we started with a 400 KM orbit but later dropped it to about 340 km above earth.  I suspect you will find the changing constraints and parameters to be more than interesting.  Near the end, Doug called in to ask about the reuse of the repurposing orbital infrastructure, including depots, as possible infrastructure for the Moon or a cislunar project.  Not only is this a possibility, we learned that something like the orbits that would be involved in doing this were used for the recent NASA GRAIL Mission.  During our discussion throughout the program, we talked about the two Mars missions now en route to Mars, Maven and the Indian mission Mangalyaan.  Note what was said about Mangalyaan and how it is making use of the type of information we discussed in this program to do a lower energy mission to Mars.  In fact, one of the hot topics of our discussion was the comparison between long-way trajectories and short-way trajectories to Mars, what each means for arrival at Mars, capture by Mars, and the return to Earth and capture by Earth.  The reentry speed coming back to Earth is crucial as these speeds can be extremely fast with lots of heat to dissipate.  Keeping speeds below 12k/s for a human Mars mission is vital.

Please post your comments/questions on our blogs and we will do our best to respond to you.  If you want to reach any of our guests, do so through me using drspace@thespaceshow.com.

Dan’s charts and graphs are here:  MultipleMarsDeparturesR1

To best follow tonight’s discussion, refer to;  ReuseForMars

Dr. William Farrand, Tuesday, 4-16-13 April 17, 2013

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Dr. William Farrand, Tuesday, 4-16-13

http://archived.thespaceshow.com/shows/1994-BWB-2013-04-16.mp3

Guest:  Dr. William Farrand.  Topics:  Mars orbiters and rovers, multispectral & hyperspectral remote sensing data.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. 

We welcomed Dr. William (Bill) Farrand to the program to discuss Martian multispectral & hyperspectral remote sensing data, the same for the Earth and throughout our solar system.  To find out more about Dr. Farrand and his work, please visit his website at http://farrviewconsulting.com.  In the first segment of our 90 minute discussion, we talked about the Mars solar conjunction, what the rover Opportunity is doing during the conjunction, Opportunity’s longevity, and why Spirit quit working.  We also talked about Curiosity, then I asked our guest about both multispectral and hyperspectral remote sensing data for Mars.  Dr. Farrand explained the imaging and the instruments in addition what we learn about Mars and other solar system objects through the remote sensing instruments providing us with this data.  In fact, in response to a listener email, our guest talked about remote sensing data from the Messenger, Cassini, Dawn, and other missions.  I asked our guest about minerals on Mars and throughout the solar system and how they might differ from the same mineral here on Earth.  Doug sent in a question about trades with the science missions as compared to doing a human spaceflight mission.  Our guest expanded the discussion to include very expensive science missions as opposed to more missions but lower in cost.  Dr. Farrand talked about the proposed commercial space missions to the Moon, Mars, and for resource utilization.  He also talked about the prize system as being a good way to further commercial exploration and development.  A listener asked about getting timely data released to the public.  Our guest directed us to the Planetary Data System which houses all the mission data, usually about six months after it was first obtained. 

In our second segment, Doug asked that if Curiosity comes up empty, might that seriously put life on Mars into doubt?  Don’t miss the response, it might surprise you.  We then discussed Curiosity and what it was up to at this time plus more on Opportunity.  As for future Mars missions, we talked about Maven and then our guest was asked if the current Mars science and robotic missions were designed to pave the way for an eventual human spaceflight mission to Mars.  He said they were not so tightly linked but it’s a discussion you will want to hear.  Our questions then changed to NASA economics and sequestration as our guest was asked for his thoughts on cutbacks, sequestration, moral, etc.  I asked about Earth remote sensing and we talked about Landsat satellites and Landsat 8.  Also the commercial World View 2 and the coming World View 3.  We talked about buying commercial data as opposed to using government sourced data, plus AI, real time data acquisition and more.  Near the end, Karen asked about the role the scientist plays in designing & developing the satellites & tools on board it. 

Please post your comments and questions on The Space Show blog above.  You can email our guest through his website or me using drspace@thespaceshow.com.

 

The John Batchelor Show Hotel Mars, Wednesday, 1-2-13 January 3, 2013

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The John Batchelor Show Hotel Mars, Wednesday, 1-2-13

http://archived.thespaceshow.com/shows/1922-BWB-2013-01-02.mp3

Guests:  John Batchelor, Dr. David Livingston:  Topics:  Our discussion is an overview of current and planned 2013 NASA planetary missions. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We do not permit the commercial use of any Space Show program or part thereof, nor do we permit Space Show programs to be edited, placed on YouTube, or other private channels & websites. Space Show programs can be quoted in news articles, papers, academic & research work but must be cited or referenced in the proper citation format. Contact Dr. Livingston for questions about our copyright and trademark policies which we do enforce.  This program is archived on The Space Show website, podcasting, and blog sites with permission from John Batchelor. Please visit the John Batchelor Show website for more information about this fine program, http://www.johnbatchelorshow.com.  During our 11 minute plus discussion, John and I provided a short overview of current, operating NASA planetary and science missions plus missions planned for 2013.  We also mentioned a few ESA missions and talked about a future Europa mission.

Please post any comments/questions you might have on The Space Show blog.  You can contact Mr. Batchelor through me at drspace@thespaceshow.com.

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