Comments on: The Flyby Mystery https://briankoberlein.com/2015/10/04/the-flyby-mystery/ Brian Koberlein Tue, 19 Feb 2019 13:26:59 +0000 hourly 1 https://wordpress.org/?v=5.0.3 By: V Guruprasad https://briankoberlein.com/2015/10/04/the-flyby-mystery/#comment-4317 Fri, 22 Jul 2016 18:58:14 +0000 https://briankoberlein.com/?p=5058#comment-4317 1. Please don’t say European Physics Journal publishes without peer-review… I submitted to it after seeing John D Anderson et al’s papers in EPL ( DOI: 10.1209/0295-5075/110/10002 ) in the April issue. 🙂
2. The occurrence of chirp is not a conjecture – the uplink telemetry carrier is already a chirp during acceleration because its frequency is changing – it’s the Doppler rate of the carrier. That is the only cause of the change of frequencies in the carrier and in the modulated side bands envisaged in the paper – point I’m trying to clarify is that the frequency rise or fall need not be “quickly”.
(please keep this private… thanks)
-prasad

]]> By: Jean Tate https://briankoberlein.com/2015/10/04/the-flyby-mystery/#comment-3450 Sat, 02 Jan 2016 21:12:14 +0000 https://briankoberlein.com/?p=5058#comment-3450 Brian, do you know if the same sort of Pioneer ‘thermal’ cause has been exhaustively investigated for these flyby anomalies? Given the active slewing and maneuvering the spacecraft were subject to, between flybys, it may be difficult to pin this effect down.

Also, what about the effects of micrometeorite impacts? These turned out to be significant, for HIPPARCOS, at least in terms of where it was pointing …

]]> By: M. https://briankoberlein.com/2015/10/04/the-flyby-mystery/#comment-3449 Sat, 02 Jan 2016 20:14:24 +0000 https://briankoberlein.com/?p=5058#comment-3449 * Should not be the Delta-V of a flyby determined by spacecraft velocities when it is at large distances, thus not depending on tracking the velocities at perigee? The article seems to claim otherwise (at its “Explanation of the flyby anomaly” part).
* Should not the SSN vs. DSN residuals (at “Indication of the excess delay in DSN data” part) remain greater, since being determined from DSN when the spacecraft was at a greater distance?

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