Talk:Project Echo

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Telecommunications Mid‑importance

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What is this?

File:Echo satellite.NASA.GPN-2000-001896.jpg

Echo 3? - no, PAGEOS probably

Which satellite is shown on this photo? The photo is dated 1965, therefore it must be after the Echo 1's and Echo 2. --Abdull 14:01, 17 April 2006 (UTC)[reply]

I asked the same question to the GRIN office at NASA, and after some research they came up with the idea that the image may not show an Echo satellite but more likely a PAGEOS satellite, see [1] for another image of PAGEOS. The NASA employee also told me the GRIN archive will be updated with new meta information for the image. When this will have happened, the wrong image should be taken off the article. --Abdull 21:05, 4 May 2006 (UTC)[reply]

Done. --Abdull 16:54, 1 January 2007 (UTC)[reply]

Mylar

The Summer 2007 Edition of Invention and Technology Volume 23, Number 1 has an article about the Echo Satellite. On page 40 of the article it states the thickeness of the mylar was 0.0005" or 1/2 mil thick (0.0127 mm). This is at odds with the thickness reported on the page. This is a valuable article which has much useful information which could be incorporated into this page. -- Randwulf — Preceding unsigned comment added by 216.17.251.159 (talk • contribs) 21:10, 27 June 2007 (UTC)[reply]

which should wikipedia name as "first communication satellite"?

In one corner we have Project SCORE launched 18 December 1958, in the other we have Echo satellite launched August 12 1960.Zebulin (talk) 19:22, 14 January 2008 (UTC)[reply]

Note Echo is named as the first passive commo satellite.--S. Rich 05:01, 18 May 2010 (UTC)

Photos

There is strong evidence that both photos show the same satellite. Can this be verified?--217.232.225.68 (talk) 09:16, 28 March 2010 (UTC)[reply]

Both photos show the same baloon. That's for sure. Still not rectified.NiMareQ (talk) 05:56, 29 March 2012 (UTC)[reply]

The Echo II static inflation was done at Lakehurst, New Jersey in 1964 in the hanger built for the Hindenberg. I have a photo of the two balloons used for the test. The photo shown for Echo II is either Echo I or Echo IA. Echo II had a coating on the aluminum foil which gave it a dull green tint. I participated in the test as a representative from G. T. Schjeldahl. I will try to E-mail a copy of the Photo. — Preceding unsigned comment added by Ron Albrecht (talk • contribs) 16:24, 11 January 2014 (UTC)[reply]

Merrger

The data between this and Echo I are the same. Moreover, merging will clear up the ambiguity as to Echo I and Echo IA. — Preceding unsigned comment added by Srich32977 (talk • contribs) 04:56, 18 May 2010 (UTC)[reply]

Orbital Parameters

The orbital parameters seemed a little off on inspection. Verifying with the wiki on orbital parameters^[1] that if ra = Apoapsis and rp = Periapsis then eccentricity = (ra-rp) / (ra+rp). The orbital parameters are in fact as given by a NASA source^[2]. So I hesitate to make the edit, however, the parameters as given, sourced from NASA and on the Project Echo side boxes, are both inconsistent with themselves. (1684-1524)/(1684+1524) = 0.050 not 0.010 as given both in the source and in the page. CharcolLion (talk) 22:27, 11 January 2015 (UTC)[reply]

References

^ http://en.wikipedia.org/wiki/Orbital_eccentricity
^ http://nssdc.gsfc.nasa.gov/nmc/spacecraftOrbit.do?id=1960-009A (accessed 11 Jan 2015)

External links modified

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Missing links to other languages

This multilingual Wikipedia strand, which covers the same topic, is not yet linked to this one. https://de.wikipedia.org/wiki/Echo_1 — Preceding unsigned comment added by 31.17.250.141 (talk) 15:17, 16 December 2020 (UTC)[reply]

Joe F. Ossanna

Ken Thompson wrote that Joe Ossanna wrote the FORTRAN code that tracked ECHO 1.

joe wrote a set of fortran programs that tracked the orbit of echo and calculated the direction to look from a point on earth. Jamplevia (talk) 02:02, 30 April 2023 (UTC)[reply]

[1] ttp://en.wikipedia.org/wiki/Orbital_eccentricity

[2] ttp://nssdc.gsfc.nasa.gov/nmc/spacecraftOrbit.do?id=1960-009A (accessed 11 Jan 2015)

[1]

[2]