By Robert Ellison. Updated on Saturday, February 19, 2022.
This animation shows a year of tides in San Francisco with the sun and moon:
I was inspired to create this after adding a tide forecast to a personal weather dashboard I have running on an old Surface Pro. I realized I didn't understand tides that much. I still don't, but I know more than I did before.
The animation illustrates four components of the tide. The obvious ones are the position of the sun and moon. When the moon is new or full the Earth, sun and moon are all lined up leading to larger 'spring' tides, which happen twice a month just like spring doesn't. As the moon waxes or wanes and becomes half full the moon and sun are at right angles and partially cancel each other out resulting in lower highs and higher lows. This is the neap tide, almost as unhelpful as 'spring'.
As orbits are not circles the Earth is closer or further away from the sun over the course of a year and the moon behaves the same way. When it's close than usual we get super moons and king tides (finally a type of tide that does what it sounds like). In the animation the sun and moon actually grow and shrink in proportion to their distance from Earth.
Here's how to read the animation. The date and time at the bottom of the screen refers to the tide right in the middle. The full screen shows the forecast running from 12 hours before the current time to 12 hours later. The vertical range is from -4 feet to 10 feet, relative to mean lower low water (MLLW), the average lowest tide over 19 years. The sun and moon are on a different scale - 360 degrees horizontally and 90 degrees vertically.
The tide forecast is pulled from the NOAA Tides and Currents API. I used SunCalc-Net for the position of the sun and moon, and the phase of and distance to the moon. For the distance to the sun I used a formula I found on StackExchange.
I wanted to both fit in a full year and run slowly enough to see what's going on each month so the video is around 20 minutes long. I won't be offended if you don't finish it.
(Published to the Fediverse as:
One Year of Tides Animated (with Sun and Moon) #etc#tides#sun#moon#sanfrancisco#video Animation showing four influences on the tide - the position of the sun and moon, and the distance of the sun and moon from the earth. Illustrates tide height and sun/moon position and distance as seen from San Francisco, California.)
Software: Catfood Earth 4.10 updates to the latest National Weather Service "API" and also 2021a timezones. Photo Sorter 1.10 helps control the scourge of duplicate JPEGs.
Timelapse: Sunset #6, what would happen if you used a style transfer neural network on every frame of a timelapse? This (instructions).
By Robert Ellison. Updated on Friday, February 17, 2023.
I've been meaning to check out the new Gimlet/Spotify podcast, How to Save a Planet, and finally listened to the first episode about wind power last week.
It was sponsored by the Infiniti QX55.
This is not even a hybrid. It's a 268 horsepower SUV. Consumer Reports says:
"The company cited 26 mpg combined (city and highway) when the QX50 was introduced for 2019. We measured just 22 mpg overall in our tests, putting it on par with larger, more powerful SUVs. And it required premium fuel. Subsequently, the official EPA estimate was downgraded to 25 mpg."
It's not even a particularly efficient SUV. You are really unlikely to be saving a planet this way. I'm not sure I can bear to find out who sponsors the second episode. I'm imagining a subscription panda steak service or bitcoin.
I shouldn't throw stones. I bought into a Volkswagen clean diesel (which came with a green tax credit before they got busted). I currently drive a Land Rover that can only hit it's claimed mpg if the engine stop technology is working. That only happens for about twelve miles after it has been serviced, which feels like the same sort of scam as the Volkswagen frankly.
Or maybe the clue is in the indefinite article and they read my post about extreme environmentalism.
(Published to the Fediverse as:
How to Save a Planet (with an Infiniti QX55) #etc#climatechange#environmentalism#podcast You're not really helping to save the planet if you're helping Infinity to sell more QX55's.)
My dentist overcharged the FSA debit card by $2.10 due to some mix up between expected and actual insurance payment. Which would have sorted itself out on the next visit, but apparently it's an FSA emergency which needs paperwork now!
There are at least 28 million of these types of FSA/HSA accounts in the US.
Life expectancy at birth has fallen to 681,995 hours. So assuming that on average each account generates two hours of needless admin per year this is the equivalent of killing 68 people.
Serial killers are pretty terrifying and justifiably get a lot of TV shows and FBI task forces aimed at them. But we'd save as many lives by giving FSA administrators 25 years to life every time they decide to reconcile to the last cent. And we should be watching Law & Order: FSA where the detectives drink to conceal the pain of uploading a PDF and explaining your situation in 500 characters or less.
Or we could save the time and money and lives and implement single payer healthcare.
(Published to the Fediverse as:
Lock up the Flexible Spending Account Administrators #etc#hsa#fsa Flexible spending account administrators probably kill more Americans than serial killers and should probably suffer similar consequences.)
"One in which we let groups of randomly selected citizens actually deliberate and govern. One in which we trust deliberation and diversity, not elections and political parties, to shape our ideas and to restrain our worst impulses."
This is very similar to what I've called legislative service, where a random jury of citizens would replace the Senate. In my vision you still have elected representatives who propose legislation and the panel of citizens acts to approve or deny. In open democracy you retain the benefit of a random selection of citizens presumably immune to corruption but they are debating and proposing laws as well. That's the gist I got from the interview, there is a book as well which I will read at some point.
Ezra raises some good objections, like voters feeling alienated from the decision of a panel that they didn't elect (less of an issue for legislative service than open democracy I think) and also the role of experts in the system (lobbyists as a positive force). I think he gets it wrong on California though:
"We have a pretty robust proposition process here. And I think the broad view is that it has been captured. Special interests get whatever they want on it whenever they want."
The problem is that Uber (or whoever) can pour money into marketing their proposition to the point where you feel you'd be letting down the puppy-saving firefighters if you vote against it (I'm possibly mixing up my ads here). With an adversarial jury style system you'd at least have a group of citizens looking at the actual pros and cons.
The interview is worth a listen, and I'll report back on the book when I read it.
(Published to the Fediverse as:
Open Democracy #politics#politicalreform#democracy#legislativeservice#opendemocracy Open Democracy is a system proposed by Hélène Landemore that would empower a random jury of citizens to enact legislation. I compare it to Legislative Service which calls on citizens to approve legislation but not propose it.)
The National Weather Service updated their weather radar API. The weather radar layer has changed a bit, you can enter one or more (comma separated) weather station IDs and Earth will show one hour precipitation for all of them. You used to be limited to a single station but with more options for the rader layer to display. Let me know if you love or hate the new version.
4.10 also includes the latest 2021a time zone database.
(I'm sure there are great reasons for it, but the 'new' NWS API is an XML document per station that links to a HTML folder listing of images where you can enjoy parsing out the latest only to download a TINY GZIPPED TIFF file FFS).
For no good reason I downloaded my gas and electricity consumption data by day for the last couple of years.
The electricity trend is unsurprising. At the start of the pandemic it jumps up and stays up. With work and school from home we're running four computers non-stop, burning lights and (the horror) printing things. Overall we used 24% more electricity in 2020.
Gas on the other hand is pretty flat. There are some different peaks at the start and end of the year, but our total gas consumption increased by 0.08%. This doesn't make any sense to me. Being at home doesn't make much of a difference to laundry but it should have had a big impact on everything else. The heating has been on way more, we're cooking breakfasts and lunches that would have occurred out of the house in 2019 and we must be using more hot water as well.
There is one strange difference between how electricity and gas are metered. Fractional kWh are distributed randomly between .00 and .99 as you'd expect. Fractional therms are totally different - we're apparently likely to use 1.02 or 2.03 therms but never 1.50. This feels like it must be some sort of rounding or other billing oddness but I can't find any reasonable explanation despite asking Google three different ways.
In a move that I might come to bitterly regret I have emailed PG&E to see if they can explain it. I'll update this post if I hear back. Or if you're a therm metering expert please leave a comment!
Updated 2021-02-20 13:51:
PG&E say:
"Thank you for contacting our Customer Service Center. Gas usage is registered by recording therms usage. If you view your daily usage online, you will see that therms are only registered in whole units. The only pace that you will see therms not as whole units is when you review the average daily usage. The pandemic started in March 2020 and since then your gas usage is up slightly versus previous years. Most customers will see a larger increase in electric usage versus gas usage when staying home more than normal. The majority of customers set the tempatures of the their heaters to very similar temperatures year over year and your heater will work to keep your house at the temperature whether you are home or not at home."
So the fractional therms are some sort of odd rounding on the downloaded data. Fair enough.
The majority of customers use the same temperature setting? Really? So that might be a good explanation if you constantly heat your house to the same temperature, but I know for sure that isn't us. We have a Nest Learning Thermostat and as I've previously reported this doesn't so much learn as just constantly turn the heating off. So staying warm is a constant battle with the thing.
Maybe the difference is that the pandemic started around Spring when San Francisco is warm enough to not need much heating. I'll look again when I can just compare winter vs winter in a couple of months.
Updated 2023-08-06 18:11:
Took a while to update, but here is some more data. Electricity stayed high until Spring 2021 and then dropped to roughly pre-pandemic levels. This is because I spent a lot of time in 2021 upgrading lighting. My house has a different type of fixture/bulb in every room making this a painful process but I'm almost 100% LED at this point which has made a difference. Gas on the other hand has got higher and stayed there and I should really replace some more windows and add some more insulation...
I really wish the utility companies made this data available through some useful API instead of needing to download the occasional CSV. I'd build a dashboard and obsess over energy usage far more.
(Published to the Fediverse as:
Pandemic Gas Mystery #etc#coronavirus#gas#electricity Why is my gas bill flat in 2020 when electricity usage has gone up 24%? A pandemic gas mystery based on PG&E data.)
(Published to the Fediverse as:
Sunset #6 #timelapse#4k#sunset#video Timelapse of sunset looking west over The Pacific from West Portal in San Francisco.)
(Published to the Fediverse as:
Post Storm Sunset #photo#sanfrancisco#sunset Photo of a dramatic sunset after a winter storm from Grand View park in San Francisco, California.)
