LoneSky

John Glenn Astronomy Park (JGAP) is a public astronomical observation facility located in Hocking Hills State Park, Ohio. In addition to several interesting design features , it was purpose-built to highlight the rising and setting Sun on the first day of each season. On these days, through angled slots in three pillars situated on both the east and west perimeters of the circular plaza, the Sun can be observed moving along a path parallel to the slots. The setting Sun through the Winter Solstice slot. There is also a pole that points to the North Celestial Pole. When viewed through the porthole in the central sphere, the viewer will see another sphere that crowns the top of the pole. Around the limb of this sphere, Polaris—the North Star—describes a partial arc over the course of the night and a complete arc over the course of a year. Looking at the North Celestial Pole. STELLARIUM LANDSCAPE I made a 360° spherical panorama—one of several over the last few months—incorpor

One of the goals of this project was to carefully colorize the famous photograph by social reformer Jacob Riis, taken circa 1900, so that it would have the appearance of a modern digital camera image. Mulberry St., New York, N.Y. courtesy Library of Congress . How naive I was. The results in this low resolution proof-of-concept, though more convincing than other colorized Mulberry Street examples I've seen, fall far short. The best I can say is that some parts of it look like old Kodachrome film. Mulberry Street colorized by LoneSky. I knew it would be tedious due to the astonishing amount of detail present in the image. I was not prepared for how difficult it would be to give it a convincingly modern look. The problem—one of the many difficulties of colorizing old photographs—is with the characteristic tone response of the original medium. Before 1906, commercial film was sensitive to just shorter wavelength light—blue and green. It even recorded some of the ultraviol

I am posting these two colorizations I made of 1940s starlet Veronica Lake without any commentary on Lake herself. There are loads of great glamour photos of her available online. I don't even remember where I got them but they should not be hard to find with an image search. I wanted to try a few techniques I've seen other colorists employ, notably by the prolific and talented Jecinci . These are color fringing/chroma noise and colored backlighting. To my eye at least, the former give the work a photographic feel, simulating lens artifacts and color film grain, while the latter adds visual punch. Veronica Lake colorized with amber backlighting. For the backlighting I added a layer with the blend mode set to overlay. Then I simply painted over the areas where I thought light should fall. The blend mode does a lot of the work. There are different ways to simulate color fringing. For these images I separated the colorized photographs into their red, green, and blue compo

I have made an addon for the World of Warcraft community that can be used to solve the Solar Collector puzzle in Uldum. DOWNLOAD Download the release version (2.0.1) on CurseForge or search for SolarCollector on the Twitch Desktop App. DOWNLOAD BETA There is no development version at the moment. The release version is the most up to date. Download the development version (9.0.2) of the addon here . Unzip the file in your World of Warcraft addons folder, typically C:\Program Files (x86)\World of Warcraft\_retail_\Interface\AddOns\ Release Notes (2.0.1) • Updated for 9.0.2 Shadowlands Pre-Patch. Release Notes (2.0.0) • Updated for 9.0.1 Shadowlands Pre-Patch. Release Notes (1.3.2) • Added an error sound if the Solve button is pressed for an already completed puzzle. Release Notes (1.3.1) • In puzzle mode, pressing the Solve button will now clear the previous solution before recalculating a new one. • Shuffle will no longer randomly activate all five check buttons.

Now that this blog has accumulated a few posts with code—either Python or SVG—that is intended to be copied by the user, it would be nice to find a more clear and convenient way to present it. I would prefer to learn the necessary markup on my own—I already added buttons to highlight and automatically copy code to the Clipboard—but I'm curious to see how a dedicated service does it. One option is Prism for syntax highlighting and line numbering and GoFile for free hosting of the prism.css and prism.js CDN files (and perhaps the SVG files as well). This is not an advertisement or endorsement for either service—particularly GoFile, which seems too good to be true, frankly. I just want to do a test for now. [Edit: GoFile does have a major catch: I just read the FAQ and files may be deleted after 10 days of inactivity. Time to start using Google Drive finally.] Here is the "Coy" theme for Python syntax styling with optional line numbering added: # Define var

Here is my current Python script for GOES-16 and GOES-17 satellites. If you followed the GOES Satellite Data Download tutorial and saved the file as suggested you need only change the path variable in the script. For example, if your path looks like this: E:/goes-16-data/full-disk/multi-band/2020/0415/1430/ The path variable will be this: path = 'E:/goes-16-data/full-disk/multi-band/' Do not include the YYYY/MMDD/hhmm/ part of your path; the script assumes you used this directory structure and will handle it automatically. Also don't forget the quotes and forward slash at the end!

Here is my current Python script for Himawari-8. If you followed the Himawari-8 Data Download tutorial and saved the files as suggested you need only change the path variable in the script. For example, if your path looks like this: D:/himawari-8-data/2020/0415/0500/ The path variable will be this: path = 'D:/himawari-8-data/' Do not include the YYYY/MMDD/hhmm/ part of your path; the script assumes you used this directory structure and will handle it automatically. Also don't forget the quotes and forward slash at the end!

GOES-16 and GOES-17 have no green band so one has to be created from the blue, red, and near-infrared channels. But no amount of simple blending of those channels will produce a truly accurate synthetic green band so additional processing—e.g. a look up table (LUT)—is usually necessary to further compensate. For demonstration purposes I'll be using mostly Himawari-8 imagery in this post. Himawari and GOES share the same imager with reasonably similar blue, red, and near-infrared bands. The big difference, of course, is Himawari includes a visible wavelength green filter (though at a wavelength that is not ideal for true color). GOES prioritizes a unique near-infrared filter in place of a green one. By combining blue, red, and near-infrared channels Himawari will produce approximately what GOES is capable of. This can then be compared to Himawari imagery using its RGB filters (with a little near-infrared added to boost the vegetation signal). Here is a commonly cited GOES synt

Data from GOES-16 and GOES-17 is free and easy to obtain, especially since Brian Blaylock created an excellent interface to download the multitude of available products from these satellites. DOWNLOAD GOES DATA Start by going to the link here: http://home.chpc.utah.edu/~u0553130/Brian_Blaylock/cgi-bin/goes16_download.cgi For this tutorial we are primarily interested in full disk GOES-16 data. We will be using imagery from the same day as in the Himawari 8-tutorial but this time at 14:30 UTC. As with Himawari-8, we will download 2000-meter resolution data. The difference is all 16 available bands are contained in a single file rather than four individual files. From the Domain drop-down menu select Full Disk . From the Product menu select ABI L2 Cloud and Moisture Imagery (Multi-Band Format) . From the Date menu select 04/15/2020 . From the Hour (UTC) menu select 14 and click the Submit button. You will next be presented with option to choose the starting minute