Timeline for What is stopping Event Horizon Telescope the size of the Earth’s orbit?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 4, 2022 at 13:16 | vote | accept | Ahmbak | ||
| Jun 29, 2022 at 22:44 | comment | added | PM 2Ring | Let us continue this discussion in chat. | |
| Jun 29, 2022 at 21:24 | comment | added | uhoh | @PM2Ring see Earth’s gravity from space and GRAIL and GRACE and GRACE-FO and Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) | |
| Jun 29, 2022 at 21:22 | comment | added | uhoh | @PM2Ring actually satellites that use radar or lasers to map planets surfaces and gravity fields to unbelievable precision have to do it too. The reason I keep emphasizing heterodyning and recording is to point out that all of those corrections can be implemented or at least refined years later during data analysis in a self-consistent way. While tricky for newcomers, the algorithms for implementing GR corrections for constellations of spacecraft are a half-century old. | |
| Jun 29, 2022 at 20:33 | comment | added | PM 2Ring | That fringe algorithm is even trickier when your telescopes are in orbit, with clocks that are experiencing changing time dilation due to variations in velocity & gravity. I guess it's similar to the problem of synching GPS clocks, but GPS sats aren't trying to log interferometry data. ;) | |
| Jun 28, 2022 at 22:48 | history | answered | uhoh | CC BY-SA 4.0 |