Patrick, You can tell by the position. The 2kg is in front, the 1.5kg next, and the 1kg last. That is the design of the experiment. Because the shapes are identical and the masses different, the heavier the sphere, the less it is slowed by atmospheric interactions. It is by measuring the differences that the experiment will provide meaningful information about the upper atmospheric density. Cheers, Tyler -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Wiggins Patrick Sent: Thursday, October 24, 2013 12:06 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Tribune Story about Gil Moore and his POPACS Spheres I found them on Celestrak's "Master TLE Index": http://www.celestrak.com/NORAD/elements/master.asp They are listed there at the bottom of the CubeSats section. They are listed there as POPACS 1, POPACS 2 and POPACS 3 but I can't find which is the 1kg, which is the 1.5kg and which is the 2kg. Do you know which is which? patrick On 23 Oct 2013, at 23:54, Tyler Allred wrote:
Patrick, I am not sure about the IDs. Where are those numbers coming from? I have been downloading the TLEs from Celestrak under the "Last 30 days Launches" heading, where they are now just listed as POPACS 1, 2 and 3. They will drop off that list soon however because they were launched on September 29th. Cheers, Tyler
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Wiggins Patrick Sent: Wednesday, October 23, 2013 11:47 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Tribune Story about Gil Moore and his POPACS Spheres
Nice work Tyler.
And I was impressed that the reporter used modern units of measure almost entirely.
I see they carry IDs 39268, 39269 and 39270. Is that correct? Are those for POPACS-1, POPACS-2 and POPACS-3 respectively?
patrick
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