PLUTON!!!

burst

Pripravnik
12. nov 2014
833
0
16
Sem za hec šel brat še na 24kur, če imajo kako cvetko. Na hitrco sem preletel in nisem našel ničesar neumnega. Sem pa pogledal prvi komentar spodaj:
Citat:
Iz fotografij se lepo vidi, kako daleč je Pluton. Na sliki Zemlje vidimo v ozadju na tisoče zvezd, medtem ko je Pluton v popolni temi. Onkraj vseh zvezd in galaksij.

Sem bil na tej strani po doooolgem času in ne vem če ni komentator mogoče samo zafrkant.
 

bles

Pripravnik
18. sep 2007
257
2
18
50
Citat:
Uporabnik jest5 pravi:


Na to in ostale nekompresirane slike se bo pa čakaloooo 1+ leto
Da bo vse dol prišlo bodo rabli leto in pol, samo saj bodo prioritetno par zadev prej poslalli. Pomoje bo že v dnevu ali dveh dol prva hires fotka površja, ko je bil NH najbližje Plutu. Vsaj tako so obljubili.

bles
 

jest5

Guru
18. avg 2007
19.642
1.687
113
Citat:
Uporabnik bles pravi:
Pomoje bo že v dnevu ali dveh dol prva hires fotka površja, ko je bil NH najbližje Plutu. Vsaj tako so obljubili.
Fotke brez kompresije bodo začele hoditi šele konec leta. V kratkem dobimo le nekaj kompresiranih fotk, nato pa bodo nalagali podatke z drugih senzorjev.


Data will arrive on Earth in a series of downlinks. Downlink sessions can last as long as about 8 hours, but are usually somewhat shorter. Whenever New Horizons is downlinking data, it can't take new photos, so the downlinks get shorter and less frequent as the spacecraft gets close to the time of the flyby, when it concentrates on collecting as much data as possible. Because data downlinks are slow, there will be much less data downlinked than New Horizons has stored on board. After data is downlinked, it must be processed before posting online. How long that will take is not yet known.

On Sunday, July 12, New Horizons will transmit the last of its optical navigation data. Then, on Sunday and Monday, July 12 and 13, there will be a series of four "Fail Safe" downlinks. These are designed to return a minimum set of data from all instruments, just in case New Horizons does not survive the flyby. A last downlink ending overnight Monday July 13, called "E-Health 1," will include one last pre-closest approach photo of Pluto.

Then there is a nail-biting 24-hour period of waiting while New Horizons concentrates on flyby science and does not communicate with Earth, followed by the much-anticipated beep of the "Phone Home" downlink on Tuesday night, July 14. Following closest approach, on Wednesday and Thursday, July 15 and 16, there will be a series of "First Look" downlinks containing a sampling of key science data. Another batch of data will arrive in the "Early High Priority" downlinks over the subsequent weekend, July 17-20. Then there will be a hiatus of 8 weeks before New Horizons turns to systematically downlinking all its data. Almost all image data returned during the week around closest approach will be lossily compressed -- they will show JPEG compression artifacts. Only the optical navigation images are losslessly compressed.

The transmission of the High Priority data set will be complete on July 20, and then image transmission will pause. For nearly two months, until September 14, New Horizons will switch to near-real-time downlinking of data from other, so-called "low-speed" instruments while it transmits just housekeeping information for all of the rest of the data. No new images will arrive on the ground during this time. I asked Kim Ennico for a little more explanation of the "low-speed" distinction, and she said:

SWAP, PEPSSI and SDC are "low-speed" compared to LORRI, Ralph, Alice and REX who are called "high-speed." They are separated in type by the spacecraft bus to which they write their data, the "low speed bus" or the "high speed bus." As an added complication, there is a science mode in Alice which writes to the "low speed bus." We've learned that when we compress and packetize the data for downlink, we have to treat the "high-speed" differently than the "low-speed." We've found you can be most efficient at downloading the "low-speed" data if you do it as a series of playbacks of data from specified mission elapsed time ranges with playback pauses. It made sense to dedicate a period of time to return all the "low-speed data." Plus during the same Juy 20 to September 14 period we can get all the spacecraft data, so if we need to reconstruct the actual pointing of the handful of near-encounter images that came down, we can do so.

On September 14, New Horizons will begin downlinking a "browse" version of the entire Pluto data set, in which all images will be lossily compressed. It will take about 10 weeks to get that data set to the ground. There will be compression artifacts, but we'll see the entire data set. Then, around November 16, New Horizons will begin to downlink the entire science data set losslessly compressed. It will take a year to complete that process.

 
Nazadnje urejeno:

sajkek

Guru
16. mar 2008
23.740
2.005
113
A tale sonda leti zdaj dalje v vesolje in naprej v 3pm ali je v kašni "tirnici".
 

yahel

Fizikalc
23. jan 2013
3.475
0
36
Citat:
Uporabnik ceedevita pravi:
ideja je, da bi še nekaj kamnov v tisti okolici ( Kuiperjev pas ) pogledala. Menda če bo denar ali nekaj takega
Ne razumem zakaj potrebujejo denar za te stvari? A zato, ker rabijo delovno silo da nekdo usmerja in študira kako spraviti sondo na druga mesta?

To bi jaz dal kakim študentom pa naj se igrajo z njo in učijo na njej.
 

jest5

Guru
18. avg 2007
19.642
1.687
113
Oprema ni zastonj, ne prostor in ne delovna sila.
Menda ne misliš, da tole upravlja en geek na PS4 v svojem prostem času
 

yahel

Fizikalc
23. jan 2013
3.475
0
36
Nič ne mislim, ne vem, zato sem pa vprašal.

Da daš en prostor in neko opremo, ki bo čez nekaj let tako ali tako odpisana je potem bolje dat študentom da se s tem ukvarjajo in odkrivajo stvari. Pa še oprema je v uporabi naprej.

Če pa je problem v sami opremi, ker se jo potrebuje za druge projekte potem pa razumem.
 

skala

Majstr
27. feb 2013
10.094
344
83
Kamnje
saj določeno število študentov se vedno igra in dela kakšne doktorate iz tega. ampak ne morejo bit sami študenti na takih projektih.