m2fkxy

5 ms·

1.
by m2fkxy 10mo ago
Mad dogs are MD-80s.
2.
by m2fkxy 1y ago
That's true. I have a bias of having part of my formal education quite focused on geospatial topics. Seeing non-geospatial folks reinventing wheels taught in GIS 101 both makes me smile and grimace thinking that we have have been doing
3.
by m2fkxy 1y ago
https://github.com/topojson/topojson
4.
by m2fkxy 1y ago
> A side effect of the geometry simplication is that there are some very small gaps between states. Based on your use case, you'll need to handle the case of the point not being within any state borders. In these rare cases, you cou
5.
by m2fkxy 1y ago
it depends on what flavour of English you speak. British English for instance tends to use plural for collective nouns.
6.
by m2fkxy 1y ago
This sounds like marshrutki. These are very common in post-Soviet countries to fill the demand left unmet by public transportation service.
7.
by m2fkxy 2y ago
the TCAS data would have been displayed. but not on instruments or in any place that you typically pay attention to the most during final visual approach (ie., mostly outside).
8.
by m2fkxy 2y ago
TCAS RAs are inhibited at low altitude.
9.
by m2fkxy 2y ago
yeah, and then you need to get refreshed orbital elements for those satellites. not good if you are in an airtight environment. celestial ephemerides don't change nearly as much.
10.
by m2fkxy 2y ago
your point being?
11.
by m2fkxy 2y ago
...which is obviously designed to be maximally visible from the public space.
12.
by m2fkxy 2y ago
it's useless thence I love it. I lied, in fact I just used it to create a couple Slack emojis.
13.
by m2fkxy 2y ago
> Plausibly, there is no real monitoring of co-orbiting bodies in space [capable] nations operating sensitive satellites and other space assets absolutely are monitoring foreign objects maneuvering in their orbital vicinity.
14.
by m2fkxy 2y ago
not at all, I love it too
15.
by m2fkxy 2y ago
it's also not the proper scale type for sequential data (red/green is diverging, but there is no central value defined in the linked map).
16.
by m2fkxy 2y ago
For those less obsessed with SAR images Touché! Also good point regarding multibounces and multipath. I would expect eg. landing gear returns to be standing out in those cases (cockpit too, although probably the canopy is coated to
17.
by m2fkxy 2y ago
Yes, radar shadow is how you would find it. But your sensor must be performing well enough for it to be able to distinguish a shadow from the surface backscatter (ie. radar signature) the aircraft is sitting on. This is usually not a proble
18.
by m2fkxy 2y ago
A little nitpick about: The number of looks correlates with a higher resolution. Yes and no. When you task an image, you usually (as is the case with Umbra) specify your desired ground resolution, eg. 25, 50, 100 cm, etc. There are t
19.
by m2fkxy 2y ago
yes, received power is inversely proportional to the distance squared. it's hard to overstate how ridiculously small the amounts of power are at play with spaceborne SAR systems.
20.
by m2fkxy 2y ago
most complex and/or commercial aircraft do share the workload between a pilot-flying, and a pilot-non-flying—in addition to the captain & FO hierarchy you are probably aware of.
21.
by m2fkxy 2y ago
the conning officer often has tons of other stuff to deal with that require them not to be distracted by having to change course themselves.
22.
by m2fkxy 2y ago
wait, that was not a joke?
23.
by m2fkxy 2y ago
bad week for upper stage engines!
24.
by m2fkxy 2y ago
not sure why you are getting downvoted, that was a funny reference to Ariane 501/V88.
25.
by m2fkxy 2y ago
not a single mention of hearing protection?
26.
by m2fkxy 2y ago
also, by the physics of synthetic aperture radar, UMBRA (or any other satellite operator for that matter) can only collect 16 centimetres data at an angle equal or greater than ~45 degrees off-nadir (and for UMBRA, less than ~60 degrees off
27.
by m2fkxy 3y ago
I am just a half-educated layman when it comes to SAR, which has a very heavy electrical engineering heritage. I hear that one very good technical resource is this book written by Iain Woodhouse [1], but I would be lucky to understand a ten
28.
by m2fkxy 3y ago
Nadir-SAR would look very confusing, full of ambiguities, and probably unexploitable since the ranging part of RADAR would not be able to distinguish the left returns from the right returns -- that's why SAR is side-looking. even with
29.
by m2fkxy 3y ago
Calm water surface is a specular scatterer, meaning radar energy will be reflected away, and proportionally so as the incidence angle increases. Images collected at lower incidence (closer to nadir) might feature very bright surface water i
30.
by m2fkxy 3y ago
It actually does not absorb radar energy, rather it reflects it away (specular reflection). That's why rougher sea surface appears brighter on SAR as it turns from a specular to a diffuse scatterer. Furthermore, in some specific condit

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