Questions tagged [dscovr]
NOAA's & USAAF Deep Space Climate Observatory for monitoring space weather.
26 questions
1vote
1answer
63views
Can I calculate how big the earth will be in photos of NASA's DSCVR EPIC camera?
I'm trying to build this thing. Shows photos of the DSCVR EPIC See the images here: https://epic.gsfc.nasa.gov/ However I found out that the earth isn't always the ...
- 131
4votes
1answer
874views
Where will the March 4, 2022 impactor hit the Moon? Will it be visible from Earth?
Wikipedia's LCROSS says: Centaur impacted successfully on October 9, 2009, at 11:31 UTC. The Shepherding Spacecraft descended through Centaur's ejectate plume, collected and relayed data, impacting ...
- 153k
26votes
5answers
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BBC: "A rocket launched by Elon Musk's space exploration company is on course to crash into the Moon and explode." Will it really explode?
The line following the title of BBC's Elon Musk SpaceX rocket on collision course with moon reads: A rocket launched by Elon Musk's space exploration company is on course to crash into the Moon and ...
- 153k
5votes
1answer
703views
Why did we think that the object was gonna hit the Moon March 4th 2022? Who's been tracking and predicting it so closely?
The Guardian's 'Out-of-control' Chinese rocket falling to Earth... Oops, I mean Out-of-control SpaceX rocket on collision course with moon says that Bill Gray's Project Pluto/DSCOVR says that the 2015 ...
- 153k
0votes
0answers
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Where are post-2017 EPIC images of Earth and the DSCOVR spacecraft coordinates available for download?
I tried to download orbital positions for the DSCOVR spacecraft in its Lissajous orbit around Sun-Earth L1 from JPL's Horizons web page but I was surprised to see the following! No ephemeris for ...
- 153k
2votes
2answers
275views
Why hasn't DSCOVR's trajectory determination been updated in JPL's Horizons after 2015-Aug-4?
I tried to download orbital positions for the DSCOVR spacecraft in its Lissajous orbit around Sun-Earth L1 from JPL's Horizons web page but I was surprised to see the following! No ephemeris for ...
- 153k
1vote
0answers
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When will DSCOVR appear too close to the Sun for reliable downlinking?
DSCOVR is in a Lissajous orbit about the Sun-Earth L2 point. That the orbit is called Lissajous rather than halo means that it's periods of horizontal libration and vertical libration are not equal. ...
- 153k
3votes
1answer
311views
Why Are EPIC/DSCOVR Images delayed for a day?
Images from Himawari 8 come down every ten minutes and look like they might about 20 or 30 minutes old, almost real time. Images from the EPIC camera on DSCOVR always seem to be from yesterday. ...
5votes
1answer
97views
How was DSCOVR "fixed" so that sufficiently dynamic attitude determination is gotten from star cameras?
The following from Space News indicate that a laser gyroscope failed and that software changes were developed and uploaded to the spacecraft bringing it back on line again recently: Software fix ...
- 153k
3votes
1answer
102views
Did specific changes to DSCOVR's mission or design produce the change from "may not represent the best expenditure " to "strong and vital"?
The excellent answer to What ever happened to the Asteroid Redirect Mission? carries a warning: There is no way to decouple politics from this; I have tried to be objective. and it's possible an ...
- 153k
4votes
1answer
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What happened to DSCOVR, what stopped working?
In Scott Manley's recent video Views Of Earth and the Seasons From A Million Miles Away - DSCOVR & EPIC after about 04:20 he says: …it’s one of my favorite ...
- 153k
9votes
1answer
421views
How would you identify when an object in a Lissajous orbit needs station keeping?
Obviously, with the international space station you need to do some station keeping when you're falling into the atmosphere. However, I saw the following image showing the Halo orbit that the Deep ...
- 9,536
5votes
2answers
309views
Why are images from DSCOVR EPIC unavailable for certain dates?
I am in love with the images available at https://epic.gsfc.nasa.gov/ taken from the DSCOVR satellite. I am curious though as to why some dates are unavailable to select. The calendar date picker ...
- 51
6votes
1answer
522views
Why put DSCOVR in a Lissajous orbit? Wouldn't a halo orbit completely avoid the Sun exclusion zone?
Halo orbits are a sub-class of Lissajous orbits. See this answer for (much) more on that. DSCOVR's orbit will put it in it's Sun Exclusion Zone in about 2020 where the communications line of sight ...
- 153k
2votes
0answers
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Why did DSCOVR increase its pictures rate on February 3rd 2018?
On February 3rd for some reason NASA tuned up DSCOVR to send images of the Earth every 20min instead of the regular 2 hours interval. Last time they did this was for the great USA solar eclipse, in ...
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