Broadcast 2936 Open Lines

25 Jun 2017 Dr. David Livingston
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Guests:  Dr. David Livingston;  Topics:  We discussed many topics on this Open Lines show including NASA announcing ET life, exoplanets, SpaceX launches, Falcon 9 costs, Vandenberg AFB, differential GPS and much more.  Please direct all comments and questions regarding specific Space Show programs & guest(s) to the Space Show blog which is part of archived program on our website, www.thespaceshow.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 our Open Line discussion for 106 minutes in two segments.  To start the program, I threw out several possible topics for discussion.  One topic that a few listeners picked up on was the article in the UK Sun about a NASA scientists getting ready to announce extra terrestrial life.  I read the headline on air and a few paragraphs of the article so those interested should be able to find it.  John from Fort Worth called into talk about it plus later in the show near the end Adrian sent in an email about it.  John was not surprised by the article but was probably skeptical about a NASA scientist making an announcement. He did have lots to say about exoplanets with rich oxygen environments.

John's main call purpose was to continue the discussion about SpaceX Falcon 9 first and second stage costs as he had asked Gwynne Shotwell about this when she was a guest on the show this past Thursday.  After John's call, Kim called form Mexico.  Kim had additional things to say about SpaceX, especially the first stage landing "hot" trajectory used after launching Bulgariasat from the Cape on Friday.  Kim also talked about a UK micro launching company that is a start up plus the small launcher market in general.  Before Kim finished her call, we talked briefly about the upcoming Starship Congress in Monterrey, CA in early August. 

In the second segment, Marshall was our first caller but we interrupted him to report live on the SpaceX launch from Vandenberg regarding the 10 Iridium satellites. It was a perfect launch and first stage recovery which we followed on the show, then we switched back to talking with Marshall.  Marshall wanted to point out weak points in a first stage rocket that might interact with the number of times a first stage could be structurally as well as economically refurbished and flown.  Don't miss what Marshall had to say as he pointed out some weak areas worth keeping an eye on regarding rockets.  Near the end of Marshall's call we talked about the SpaceX guy mentioned on the show with Gwynne who created the software for the first stage landing.  Marshall said it was done with differential GPS which he uses on his farm equipment. He then gave us a simple explanation of differential GPS.

As our program was nearing its end, I announced a rare Space Show award.  You will have to listen to the program to hear who got the award and the type of award.  I will say it was given to a person who participated in the Airship To Orbit (ATO) blog posts which began on the blog for the April 9 Open Lines show when Kim asked a question regarding how does one know ATO was not possible based on the laws of physics and solid engineering. I believe this discussion may be the longest and most involved ever Space Show blog discussion.  Dr. Jurist provided Kim with short response and suggested people disagreeing with him "run the numbers" to verify what they were saying.  Jim Fincannon has been doing a stellar job regarding the analysis of various stages of ATO His work has been time consuming for him and on behalf of all Space Show listeners, I thank him for doing this. Jim is intellectually honest and that always gets my respect and shout outs.  I think he has one or two more segments left of his work when he has time.  On the other hand, the person getting the award got it for different reasons.  I also said The Space Show may give out other similar awards this year or later on.  So don't miss this brief discussion as the program was ending.

Please post your comments and questions on TSS blog.  You can reach me or any of the callers through me should you want to get in touch with us.  

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