Questions tagged [dscovr]

NOAA's & USAAF Deep Space Climate Observatory for monitoring space weather.

Filter by
Sorted by
Tagged with
1 vote
1 answer
57 views

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 ...
Jeroen3's user avatar
  • 121
4 votes
1 answer
846 views

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 ...
uhoh's user avatar
  • 149k
26 votes
5 answers
7k views

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 ...
uhoh's user avatar
  • 149k
5 votes
1 answer
667 views

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 ...
uhoh's user avatar
  • 149k
0 votes
0 answers
58 views

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 ...
uhoh's user avatar
  • 149k
2 votes
2 answers
227 views

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 ...
uhoh's user avatar
  • 149k
1 vote
0 answers
51 views

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. ...
uhoh's user avatar
  • 149k
3 votes
1 answer
278 views

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. ...
PDX_Dragon's user avatar
5 votes
1 answer
90 views

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 ...
uhoh's user avatar
  • 149k
3 votes
1 answer
93 views

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 ...
uhoh's user avatar
  • 149k
4 votes
1 answer
272 views

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 ...
uhoh's user avatar
  • 149k
9 votes
1 answer
408 views

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 ...
Magic Octopus Urn's user avatar
5 votes
2 answers
271 views

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 ...
Mike's user avatar
  • 51
6 votes
1 answer
471 views

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 ...
uhoh's user avatar
  • 149k
2 votes
0 answers
55 views

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 ...
Mic's user avatar
  • 201
1 vote
1 answer
281 views

How could the recently explained "glints" seen by DSCOVR appear so compact considering the finite size of the sun?

The discussion section of the very recent, on-line-available Terrestrial glint seen from deep space: oriented ice crystals detected from the Lagrangian point Alexander Marshak, Tamás Várnai and ...
uhoh's user avatar
  • 149k
4 votes
1 answer
629 views

Now what do we think? Is this purple dot really caused by Cassegrain optics and coherent backscattering?

EDIT: The stories in Phys.org NASA's EPIC view spots flashes on Earth and Live Science Mysterious Light Flashes 1st Spotted by Carl Sagan Explained seems to have information potentially relevant to ...
uhoh's user avatar
  • 149k
2 votes
4 answers
824 views

Why does DSCOVR's camera EPIC see at least 13 sunrises and sunsets per day?

In this NASA Goddard YouTube video titled "One Year on Earth – Seen From 1 Million Miles", I've gotten stuck on the line In this view, EPIC sees the Sun rise in the west, and the Sun set in the ...
uhoh's user avatar
  • 149k
4 votes
1 answer
265 views

How did DSCOVR use its ten thrusters for the long burn maneuvers MCC and LOI?

From this answer to my previous DSCOVR question, and this and this and this article, it seems that DSCOVR used one or more of its ten thrusters for the long burns for mid course correction (MCC) and ...
uhoh's user avatar
  • 149k
4 votes
1 answer
560 views

What is the Distinction between DSCOVR's "engines" and "thrusters"?

I am reading this article about DSCOVR which links (ref 16) to this: DSCOVR: Mission Success for Moog Engines Over a Decade Later , about the recertification by MOOG of the MONARC 5N monopropellant ...
uhoh's user avatar
  • 149k
9 votes
1 answer
2k views

Why is there a purple dot in the middle of this EPIC image?

On 29 July 2015, NASA released a second image from the Earth Polychromatic Imaging Camera (EPIC) on the Deep Space Climate Observatory (DSCOVR) satellite: If you zoom in on the full image, you will ...
gerrit's user avatar
  • 11.6k
6 votes
1 answer
248 views

What is the timeliness of DSCOVR-EPIC image acquisition and public release?

One of the original ideas behind what became the NOAA Deep Space Climate Observatory (DSCOVR) was to to provide a live feed of the Earth from L-1. DSCOVR-EPIC photo released 20 July The Earth ...
gerrit's user avatar
  • 11.6k
5 votes
2 answers
1k views

Why has no TLE been published for the DSCOVR satellite and the Falcon 9 R/B?

So, usually a few days after every launch, I go out and check out the published TLE data for each satellite, made public courtesy of CelesTrak. It generally includes all the orbital parameters for ...
marked-down's user avatar
  • 8,941
7 votes
1 answer
297 views

How can we track where DSCOVR is now?

Celestia supports importing spacecraft data, but I didn't see any data for DSCOVR. Is there any way to see where it is now so we can track it on it's way to Sun-Earth L1?
Ryan Caskey's user avatar
10 votes
1 answer
363 views

Why does DSCOVR appear to be missing solar cells?

In recent photos of DSCOVR I've noticed it appears to be missing eight solar cells in its array. In photos from the original "unboxing" from storage it appears to have all its cells. Why is this?
Schwern's user avatar
  • 8,006
7 votes
2 answers
706 views

What plane will DSCOVR’s orbit be in?

According to the “NASA Earth Science Instruments” section of noaa.gov's DSCOVR page, DSCOVR will make unique space measurements from the first sun-Earth Lagrange point (L1). ... 1.5 million ...
James Waldby - jwpat7's user avatar