Weather Planning for Eclipse Day
eclipsophile.com
eclipsophile.com
We have several cameras on board, including one that points at the sun and one that takes video. It all gets live-streamed to the ground (actually, that's my contribution to the project - the communications system) and sent off to YouTube.
We're launching from New Brunswick, Canada, and we'll be going up to about 30km, or 100k feet. So the clouds definitely won't be an issue for us.
I'm from NS myself (Halifax) and have been trying to convince my parents to drive up to NB to see the eclipse. I'll be home for Easter so that'll probably be my last attempt!
And a camera is not the same experience as looking around and being in a circle of darkness with a lit horizon in all directions.
You need to feel the change in air and the sounds to get the whole experience.
I’m in Charlottetown, and I’ll be driving to North Cape (as will the rest of the Island). Between worrying about the weather, I’m also concerned that I won’t be able to get to North Cape in the first place.
So far, I managed to beat the solar glasses rush by ordering in January. I’m trying to figure out the timing to get to North Cape early enough to have a spot to park, but not too early that my kids will lose their minds with the waiting.
During totality, you see the Sun's corona with your own eyes.
In any partial phase, you are seeing the Sun's photosphere - the same bright surface of the Sun you see on every clear day. So you need eye protection.
When the Moon completely blocks the photosphere in totality, you get to see the much fainter solar corona. The corona is only about as bright as a full Moon.
You don't need and should not use solar glasses during totality. Don't take my word for it, if you get them go out at night and look at the Moon through them (doesn't have to be full).
Your kids are fairly young? You want to keep them safe during the partial phases, and also make sure they get to view totality unfiltered.
There was a lengthy discussion on Reddit the other day, nominally about photography but also about viewing with your own eyes:
https://old.reddit.com/r/photography/comments/1bk7f0l/total_...
It bums me out that there is so much misinformation going around about eclipse viewing safety, specifically the notion that you should wear eclipse glasses during totality.
In that same Reddit thread, someone cites a misinformed New York Times article. I'll link it here because it was downvoted and hidden and is worth a quick read (along with our replies) to see how badly mistaken a major news publication can be:
https://old.reddit.com/r/photography/comments/1bk7f0l/total_...
To point the camera we have a lot of clever software and hardware. I didn't have any part in it, so I'll try to explain it as best I can. There's a diagram here, which hopefully will help you to follow along: https://eclipseplus.ca/Project_Details/Payload_Design/
We have a fixed camera mounted above a mirror. The mirror is on a special gimbal, which can be maneuvered using two servos and a bit of math. For coarse aiming, we have an IMU on board which uses the magnetic field of the Earth to figure out its orientation. For fine aiming, we do a bit of image processing to try and center the sun in the field of view of the camera. It's not perfect, but since we're only capturing still images, it's okay if not all the images have the sun in view.
Also of note is the filter, which starts in-place (to protect the optics) and automatically moves out of the way during totality. It also moves back into place afterwards so that we can continue safely taking images after the eclipse.
The balloons on the landing page are accurate! Those pictures are from past launches, which used the same payload (with some changes between each launch)
The actual bandwidth is 500kbps, or about 350kbps usable after FEC. I'm encoding video at 640x480, 12FPS. It's almost entirely custom software. I'm using a Gstreamer pipeline to take in the video stream, encode it, and encapsulate it. From there, I packetize it, run it through an LDPC encoder (for error correction), data whitening, and finally send it to an FSK modem to convert it into radio waves. On the ground station I basically do the same thing in reverse.
At 1W transmission, I've gotten video over 140km from a balloon to the ground. Most of that distance is horizontal - the winds tend to blow the balloon quite far. The math says the system should be good to at least 250km.
A partial eclipse is a crescent sun, similar to how our moon is a crescent much of the time. The crescent is shaped mildly differently due to the occlusion, but really after that novelty is gone, it's just daytime with a crescent sun.
A sky with a total solar eclipse is a new, third kind of sky that is neither like day or night. It's as different from those as they are from one another, and what you will feel seeing it will be as though you have lived your whole life during the nighgband are seeing a night sky with the milky way for the first time. If you have the opportunity, don't miss it.
The only thing this comic gets wrong is neglecting to mention the Y axis is a log scale. https://xkcd.com/1880/
I live "in the path" and I've got friends nearby with rural spots to watch from.
Or: I can take a bit of a drive and find a spot to hang out pretty much directly under the center line, but they will be crowded and there isn't much of a practical way to avoid that.
The difference, according to maps, seems to be just a few seconds of total occlusion. Or is there more to it than that?
I'm absolutely sure that it is completely coincidental. And yet: It is also very alluring.
In the same way that the city streets in DC coincidentally lay out to the mason's square and compass shape. The forfathers of this city were probably travellers from the future that knew the significance of this event, and laid out the entire city based on it. They just forgot to carry the one somewhere, and missed the alignment
But do you really think the rather small city of Norwalk, Ohio was planned for a nearly-perfect alignment for the center of the 2024 NA total eclipse? (Feel free to look on the eclipse map of your choice -- I'm not trying to deep-link or screenshot that, and it would be beneficial to the viewer to be able to pan around. And it's easy to find: When panning around the eclipse map, Norwalk is about the only city directly on the center-line up North in Ohio.)
(That said: The alignment of Main Street to the center path of the 2024 eclipse in Norwalk might indeed be planned. Sandusky, Ohio is not far from there, and is said to have been designed around masonic symbols[a]. I don't discount the idea. And that's part of what makes it alluring to me, even though I tell myself that it must be a coincidence.)
a: https://freemasonry.bcy.ca/history/sandusky/sandusky.html
It was weird and spectacular, and absolutely worth spending some time (in a tightly time-tracked job) to go outside and have a good long look at: There was absolutely a crescent-shaped sun visible behind those clouds, and that is a thing that I will never forget.
I don't think it was a ruined experience at all, though I certainly hope that this next eclipse is a lot better for whatever viewing-point I decide to choose and I understand that a cloudless sky is ideal.
The difference is how long you will experience totality.
As for location, I’m finding the NASA map hard to use: https://science.nasa.gov/solar-system/skywatching/eclipses/n...
For the weather, I realize that clouds may pop up. And, I’m not sure how much I can rely of local / regional weather to tell me where, within a 4-5 hour radius, I should drive for best conditions.
Lining these two up (as well as handling traffic), will be difficult I imagine. For what it’s worth, I’ll be in Austin.
—
From another comment: https://www.cleardarksky.com/ec/2024-04-08_eclipse_map.html
This time of year is thunderstorm season, and I'm already concerned about it since I've purchased plenty of solar protection for my gear. I'm just hoping my cunning plan of buying it all last year so far in advance confuses whatever it is that decides when I spend money we get bad visibility. ????
All I can say is ... if you haven't experienced this in your life, go see it. But you must be in the arc of totality, even 99% isn't going to do it. The closer you get to the centerline, the longer totality lasts.
And it's something else. It gets very dark, very quickly. It gets cold, the stars come out, it feels surreal.
It's awe-inspiring.
The difference is logarithmic, though. And 90% vs. 100% center is only a matter of a few seconds difference.
The difference between being on the far edge vs. 10% inside is much longer, though.
[1]https://www.cleardarksky.com/ec/2024-04-08_eclipse_map.html
1. Check the Clear Sky Charts map fghorow shared (https://news.ycombinator.com/item?id=39807463)
2. Look up flights to major cities in the path
3. Check rental car availability
LA to Dallas by car is about 20 hours. You could do that in two or three days...
A fellow HN person put this map together, which I've found to be particularly useful: https://celestialprogramming.com/apps/SolarEclipseViewer/vie...
(My job is much easier, here in Ohio, but I've already got a few hours invested in surveying and weighing different viewing locations.)
Amazon seems full of their usual random-brand-name search spamming.
I see this, but don't know how many people are informed by it: https://eclipse.aas.org/eye-safety/how-to-tell-if-viewers-ar...
Just wear your regular sunglasses, and don't look at the Sun during the partial phases.
Bring a white sheet to put on the ground, and a large piece of paper with pinholes stuck into it. With your sunglasses on, look away from the Sun and project it through the pinholes onto the sheet.
Keep watching as totality approaches, and something magical may happen: ripples of light and dark on your sheet, as if you were at the bottom of a stream or river.
Then look up and you may see the Moon's shadow approaching at high speed!
When the shadow overtakes you, turn around and make sure there are no little specks of light around the edge of the Sun. (These are called the diamond ring and Baily's beads.) A quick glance won't hurt you, just keep them out of the center of your vision so you don't have an afterimage.
Then take your sunglasses off and behold the awesome solar corona.
As soon as any of those specks come back, turn back around, sunglasses go on, and maybe head out to beat the crowds!
You can buy these direct (for example), at a decent price:
A partial eclipse is nothing special. There isn't much point in looking at it. Just as you have seen a crescent moon many times, now you will see a crescent sun.
It won't even have any of the cool craters and textures of the crescent moon. Boring!
Totality is where it's at. And if you forget about trying to look directly at the partial phases, you don't need eclipse glasses.
But I’d argue seeing the diamond is far from boring, and you definitely should not view that without protection.
DO NOT purchase brand name spam glasses, in fact I would avoid Amazon altogether. NASA has a page of reputable vendors: https://eclipse.aas.org/eye-safety/viewers-filters
I would purchase them now, as mine (Rainbow Symphony) took a few days to ship and arrive.
The main roads and the reasonable alternates might all be slow over a wide area, leading to the apps thinking that various roads that would never normally be suggested would be better.
Here is what a friend told my happened when he was trying to get from the middle or Oregon to the Bay Area after the 2017 eclipse:
> Google kept sending us onto logging roads: we bailed on the first when we were told to turn onto a non-existent road; we bailed on the second when a van came out and told us that ~5 cars were stuck axle-deep in mud; we bailed on the third when we got to a sign informing us that we were about to enter an off-road-vehicle trail.
The moment the eclipse ended we drove back to the interstate, which minutes prior had been empty.
It was bumper-to-bumper. Like something out of a cartoon.
The drive back to Chicago took 14 hours. I decided to follow Waze, which took me (and an endless line of cars with the same idea) through a one-lane dirt road through a bunch of farms.
The people who lived there took lawn chairs out and sat down to drink beers and watch the strange procession.
Stopped for lunch at a crossroads Panda Express. It was bedlam. Thousands of people all looking to eat something in rest stop that usually feeds dozens. The crew of pimply highschoolers resorted to slapping spoonfuls of random faux Chinese food into Styrofoam containers and giving it out for free. "Just take it!"
The only scary part was being caught by one of those Midwestern thunderstorms about two hour out from Chicago--at 2am, after diving for about 18 hours straight, sticking my hand out of the window to wet it before slapping myself on the face to stay awake (no way to pull over--not when visibility is ~zero).
Adventure indeed!
In general it looks like the closer you go to Mexico, the better your odds — historically.
Anyway, it was worth all the trouble. One thing was that I got some great photos of the eclipsed sun. I'm looking forward to the upcoming event in April. I'll be in Mexico where viewing should be good, bad weather being less likely in that region. Hopefully I'll be able to get even better photos this time around.
Also no need for glasses during totality. Before totality, you can look at the shape of shadows through a piece of paper with a whole punched in it.
Truth. I have a piece of land way out in the sticks here in Mena, AR, and on the rare occasion, our little backroads get very clogged up (think hunting season mostly), though we are right in the path of totality for the eclipse, and the town is even having an "eclipse festival" building up to it.
I'm thankful my wife and I won't have to drive anywhere that day. We're going to hang out in the yard and view it in our little field. Keeping my fingers crossed for nice, clear skies that day. :)
I have pretty vivid memories of my first partial solar eclipse from when I was in school, but being in the path of totality was a completely different experience, and about 10,000x better, even without seeing it.
If you're willing to travel 30 hours for a total solar eclipse, wait a few years and travel 10-20 hours instead.
They're not _that_ rare.
However, if it's not your thing, then it's not your thing. Nothing anyone says will really change that. But discouraging someone else is kind of an asshat move
But they weren't asking if they should go, they were asking how to convince someone else to spend 30 hours travelling for 4 minutes of eclipse. My answer was that they should roll it into a larger trip, to amortize the cost.
I was giving them an opinion on how I'd feel in that person's shoes. And I say this as someone who has travelled for eclipses, and will travel for this one.
There are other ones but the path of totality doesn’t pass completely on land or if it does it passes through Libya or something.
reference: https://en.m.wikipedia.org/wiki/List_of_solar_eclipses_in_th...
https://www.statesman.com/story/news/local/2024/03/08/solar-...
Traffic will be in all directions. If you can just chill for several hours and then leave.
If you haven't experienced an eclipse in the arc of totality, and that's where you're already going to be, I would strongly suggest (weather and whatever else permitting) that you drive as close to the centerline as you can, and just park the car and stand there for a few minutes.
It is something everyone should experience if they can.
Ah well, there's always the next one in... 2045.
As in a region of high atmospheric pressure.
As this would likely mean low or no cloud formation.
Anyone have a good source of live or forecasted pressure maps?