Dust Devils In Jezero Crater, single-point repository of imagery Options

[PDP8E]

SOL 283 - 15 images (3x5 quick peek) -- 3:15 PM -- NO DDs, but there were clouds over Kodiak.

SOL 284 - 45 images ! -- 1 Stance - JPL Broke my simple-minded Detector
12:06 PM to 12:27 PM (21 minute session)
** 15 images = 496 x 1296 pixels
** 30 images = 256 x 656 pixels
** Interleaved...
** (I'll see what I can do later...)

But there was another DD watch at 12:30 -- 15 images -- 3x5 quick peek
There is a DD in Stance 3

[PDP8E]

SOL 285 -- 21 images -- 1 Stance -- 11:42 AM
A DD seems to have come over the top of the Rover -- then we pick up the action.

4 DDs -- one on the crater wall --- the one that passed over the Rover -- a 'fire hose' DD off to the right
Near the end, a DD moves in from the left.

[PaulH51]

SOL 285 -- 21 images -- 1 Stance -- 11:42 AM
A DD seems to have come over the top of the Rover -- then we pick up the action.

Great capture

We sure could do with one like that passing over InSight

[tau]

Storyboard (corrected version) for the dust devils on sol 285.


Edit: The frames at second 17 and 21 were accidentally mixed up, which I didn't notice until I made an animation.
The storyboard is now corrected.

[PDP8E]

SOL 286 -- 21 images -- 1 Stance -- 12:05 PM -- No DDs

Tau - I love that storyboard!

[tau]

Animated dust devils from sol 285.
The interaction of the dust devil with the dunes and ripples in the first frame is interesting (see also "storyboard").

[TrappistPlanets]

Animated dust devils from sol 285.
The interaction of the dust devil with the dunes and ripples in the first frame is interesting (see also "storyboard").

WOW! stunning

[PDP8E]

SOL 287 -- DD Watch -- 15 Images -- 3 images in 5 Stances -- quick peek --- Noon
DDs in Stances 4 and 5:
Stance 4: minor DD in the center -- larger DD on right
Stance 5: pick up the progress of the larger DD from Stance 4

[PDP8E]

SOL 291 -- 21 images -- 1 Stance -- 1:10 PM
We have 3 things going on ... a DD coming in from the left -- a gust passing the Rover -- and Clouds!

[PDP8E]

NO DDs detected: SOL 292, 293, 294, 295, 296

[PDP8E]

SOL 297 -- 21 images -- 1 stance -- 1:00PM
A well-formed and slow-moving DD in all frames

NOTE: Slow-moving DDs play havoc with the standard technique of averaging or median-ing all the frames to arrive at a 'normal background image' to analyze each individual frame against -- it causes the dark 'shadow' near the DD. -- I am starting to investigate another technique.

[PDP8E]

SOL 298 -- 21 images -- 1 Stance -- 1:25 PM
A DD on the deltas

[PDP8E]

HAPPY SOL 300 -- 21 images -- 1 Stance -- 11:10 AM
only Frame #1 has a DD before it 'evaporates' (if that's the word)
It is centered and on the deltas (far)
Here is the single frame:

[JRehling]

Slow-moving DDs play havoc with the standard technique of averaging or median-ing all the frames

The median is the special case of a given percentile rank per pixel, where that percentile happens to be 50. You might have better results with a different percentile, say, 25.

[PDP8E]

SOL 300 DD Bonus
NAV Cam 11:45 AM


JRehling: That is a brilliant idea... I will give that a try