Message boards :
Nebula :
Incorrect barycentric correction
Message board moderation
Author | Message |
---|---|
David Anderson Send message Joined: 13 Feb 99 Posts: 173 Credit: 502,653 RAC: 0 |
The Arecibo telescope is accelerated by the Earth's rotation and by the gravitational pull of the Sun and the planets. These various accelerations cause drift in the detected frequency of an ET signal. Fortunately, it's possible to calculate this offset and subtract it from the detection frequency; this is called the signal's "barycentric frequency". Eric Korpela recently discovered that we were doing this wrong; essentially, we were adding instead of subtracting. D'oh! We're in the process of fixing this in the Nebula code, and future multiplet-finding will use the correct frequencies. |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
Has this any relation to client/frontend code? If yes, was it fixed in SETI MultiBeam v7 to v8 transition? SETI apps news We're not gonna fight them. We're gonna transcend them. |
David Anderson Send message Joined: 13 Feb 99 Posts: 173 Credit: 502,653 RAC: 0 |
It's not part of the front-end code. |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.