It's the Rosetta probe's last day - Page 1
Forum section: electronics / general

author: Gyro
author_rank: Super Contributor
timestamp: September 30, 2016, 09:33:24 am
content: It's the Rosetta probe's last day around Comet 67P.At least its end will be realtively quick (well 1m/s anyway!) ...http://www.bbc.co.uk/news/science-environment-37511861P.S. In case anyone missed it, they found the lander a few weeks ago too:http://www.bbc.co.uk/news/science-environment-37276221

author: thunderbuny
author_rank: Contributor
timestamp: September 30, 2016, 09:40:41 am
content: Yep it is sad she is going to die today but remember all the data it gave us.not to mention were gonna know what happens when a probe hits a comet how much does it deflect etc.for live streamhttp://rosetta.esa.int/Farewell rosetta and thank you.

author: Gyro
author_rank: Super Contributor
timestamp: September 30, 2016, 09:57:06 am
content: Very true. Thanks for the stream link.After all this time of having a bird's-eye view, it feels a bit strange that there will be no pictures of the dust cloud. Edit: with data rate down to 40kb/s it's doubtful we'll ever see those last frames.

author: Halcyon
author_rank: Unknown
timestamp: September 30, 2016, 10:16:56 am
content: Currently down to about 50 kilobits/sec.https://eyes.nasa.gov/dsn/dsn.html

author: EEVblog
author_rank: Unknown
timestamp: September 30, 2016, 10:25:56 am
content: Looking forward to the hires pics as it descends, I think they said 1mm resolution

author: RoGeorge
author_rank: Super Contributor
timestamp: September 30, 2016, 10:32:19 am
content: Offtopic:Why would someone use the scientific notation "2.64 x 10-19" together with "kW" instead of "W" (see picture above)?Is this a normal thing for countries where the imperial system is used?I don't want to start a imperial/metric flame, I just want to now from someone used with imperial system if this notation is frequently used, I mean "2.64 x 10-19kW" instead of "2.64 x 10-16W".

author: EEVblog
author_rank: Unknown
timestamp: September 30, 2016, 10:35:03 am
content: 16km out!30cm/pixel

author: EEVblog
author_rank: Unknown
timestamp: September 30, 2016, 10:36:09 am
content: Quote from: RoGeorge on September 30, 2016, 10:32:19 amMaybe because they quote transmit power in kW?

author: helius
author_rank: Super Contributor
timestamp: September 30, 2016, 10:39:58 am
content: Quote from: RoGeorge on September 30, 2016, 10:32:19 amNo, it's not normal, although kW is part of a common unit for household energy use (the kW·h).For RF signals it would make more sense to express the power in mW, since that is what dBm does.

author: John Coloccia
author_rank: Super Contributor
timestamp: September 30, 2016, 11:48:25 am
content: Quote from: RoGeorge on September 30, 2016, 10:32:19 amMy guess would be that they have a standard for all of their units to prevent mistakes, and that all of their equations, spreadsheets etc are setup to accept kW.

author: Gyro
author_rank: Super Contributor
timestamp: September 30, 2016, 12:15:18 pm
content: 10 Seconds before impact, so <10m?http://www.bbc.co.uk/news/science-environment-37520420Very little time to transmitthatdata!Farewell Rosetta!

author: RoGeorge
author_rank: Super Contributor
timestamp: September 30, 2016, 01:48:20 pm
content: Wow, at 51 meters!Too bad it's so out of focus, thought.

author: XOIIO
author_rank: Super Contributor
timestamp: September 30, 2016, 02:50:47 pm
content: Quote from: EEVblog on September 30, 2016, 10:35:03 amWow, that is just gorgeous.Now I want to play ksp again but I don't think the processor on this computer is up to the size rockets I launch lol