Timeline for Can we detect the cell phone, satellite phone, or walkie talkie of someone walking on Mars from Earth?
Current License: CC BY-SA 4.0
20 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 7, 2018 at 13:04 | comment | added | gerrit | @Uwe Great info. Could you edit that into your answer? | |
| Sep 7, 2018 at 12:16 | comment | added | Uwe | The signal from a walkie talkie is not well suited for the noise reduction methods necessary for detection on Earth. The data rate of modulated speech signal is too high. A digital signal is needed with a very low and very constant data rate to allow effective noise reduction by signal integration over a longer time interval. A starting sequence with known shape to synchronize the receiver on Earth to the timing of the signal from Mars. | |
| Sep 7, 2018 at 11:02 | comment | added | gerrit | @Alice No, for then the question is obviously yes. I mean a direct detection from Earth. | |
| Sep 7, 2018 at 10:51 | comment | added | Alice | Does detecting from Earth by the way of controlling relay orbiters around Mars count? | |
| Sep 7, 2018 at 9:25 | history | edited | gerrit | CC BY-SA 4.0 |
change title to reflect content
|
| Sep 7, 2018 at 9:21 | comment | added | gerrit | @can-ned_food Either. | |
| Sep 7, 2018 at 3:56 | comment | added | can-ned_food | Is the observer terrestrial, or orbiting? | |
| Sep 6, 2018 at 19:28 | answer | added | Uwe | timeline score: 6 | |
| Sep 6, 2018 at 18:07 | comment | added | gerrit | @JamieB Good point about cell phones. I suppose satellite phones are more like cell phones here, so it'd have to be a walkie talkie. | |
| Sep 6, 2018 at 18:04 | comment | added | JamieB | For cellphones, there's a tech question here too -- I don't know that they will transmit at all if there's "no signal". Cellphones are constantly receiving information from the towers around them so they know who to talk to and how. If there are no towers around to chat with, I'm not sure the cellphone will transmit at all. If you were writing a story about trying to detect someone who found themselves stranded on mars, a walkie talkie might work better. (Walkie talkies mostly use more power than cellphones too, which would make them easier to detect.) | |
| Sep 6, 2018 at 18:00 | history | tweeted | twitter.com/StackSpaceExp/status/1037762514312941568 | ||
| Sep 6, 2018 at 17:55 | vote | accept | gerrit | ||
| Sep 6, 2018 at 22:31 | |||||
| Sep 6, 2018 at 17:32 | answer | added | jcaron | timeline score: 13 | |
| Sep 6, 2018 at 17:04 | comment | added | IanF1 | Interesting. Sounds like a good question for xkcd what if! | |
| S Sep 6, 2018 at 15:56 | history | edited | peterh | CC BY-SA 4.0 |
fixed typo, clarified antenna location
|
| S Sep 6, 2018 at 15:56 | history | suggested | yeah | CC BY-SA 4.0 |
fixed typo, clarified antenna location
|
| Sep 6, 2018 at 14:23 | review | Suggested edits | |||
| S Sep 6, 2018 at 15:56 | |||||
| Sep 6, 2018 at 12:21 | history | edited | Muze | CC BY-SA 4.0 |
refining a bit
|
| Sep 6, 2018 at 10:58 | answer | added | Hobbes | timeline score: 22 | |
| Sep 6, 2018 at 8:26 | history | asked | gerrit | CC BY-SA 4.0 |