3 ms·

> Are all the inputs (from buoys, weather balloons, stations, etc) from decades of history stored I was also thinking about smartphones. They have barometric d

> Are all the inputs (from buoys, weather balloons, stations, etc) from decades of history stored I was also thinking about smartphones. They have barometric data, and while it might vary from phone to phone, I'm sure something like a kalman filter + historic data could do something there. Think about gathering all the data from "stationary" phones, correlate that with weather sat data, and with real "ground truth" weather stations, and then go back 30 - 60 min / a day, and see what comes out.

Havoc 2y ago
>smartphones. They have barometric data For anyone else having a TIL moment: It's apparently for vertical position and supposedly sub meter accurate. o_O
- p_l 2y ago
  Depends on smartphone (and smartwatches). Not all have it, at times it disappeared from brands that had it earlier. The smartwatch series I use explicitly include it because it's essentially the "all in one" version in a series that had smartwatches designed for aircraft use (including military versions where they serve as backup cabin pressure warning, apparently)
  - usrusr 2y ago
    Smartwatches include barometers because they enable elevation measurement far more accurate than than GNSS (GPS and GPS-alikes, they tend to be noticeably less accurate in the vertical than in the horizontal). In particular when both are combined: barometry for high frequency changes (going up a hill) continuously calibrated against a long term average of the GNSS elevation to filter out low frequency changes in barometry (weather influence). But back to device could weather observation, this would require continuous GNSS, devices don't do that (network location would not be good enough).
orion138 2y ago
Dark Sky used that data for hyper local forecasting… https://news.ycombinator.com/item?id=22740466 https://news.ycombinator.com/item?id=22740466 https://www.theverge.com/2015/6/22/8822767/dark-sky-weather-app-crowdsourced-data https://www.theverge.com/2015/6/22/8822767/dark-sky-weather-...
- xgulfie 2y ago
  I'm still grumpy about apple buying and shuttering darksky
- thatcat 2y ago
  They stopped using it during later years.
- counters 2y ago
  Not really; it was a gimmick. They used standard forecast post-processing techniques to bias correct global/regional weather models. There is virtually no evidence they actually used device data in this process.
phillipseamore 2y ago
"Collecting and processing of barometric data from smartphones for potential use in numerical weather prediction data assimilation" https://rmets.onlinelibrary.wiley.com/doi/10.1002/met.1805 https://rmets.onlinelibrary.wiley.com/doi/10.1002/met.1805 https://github.com/dmidk/smaps https://github.com/dmidk/smaps

Havoc 2y ago

>smartphones. They have barometric data For anyone else having a TIL moment: It's apparently for vertical position and supposedly sub meter accurate. o_O

p_l 2y ago
Depends on smartphone (and smartwatches). Not all have it, at times it disappeared from brands that had it earlier. The smartwatch series I use explicitly include it because it's essentially the "all in one" version in a series that had smartwatches designed for aircraft use (including military versions where they serve as backup cabin pressure warning, apparently)
- usrusr 2y ago
  Smartwatches include barometers because they enable elevation measurement far more accurate than than GNSS (GPS and GPS-alikes, they tend to be noticeably less accurate in the vertical than in the horizontal). In particular when both are combined: barometry for high frequency changes (going up a hill) continuously calibrated against a long term average of the GNSS elevation to filter out low frequency changes in barometry (weather influence). But back to device could weather observation, this would require continuous GNSS, devices don't do that (network location would not be good enough).

orion138 2y ago

Dark Sky used that data for hyper local forecasting… https://news.ycombinator.com/item?id=22740466 https://news.ycombinator.com/item?id=22740466 https://www.theverge.com/2015/6/22/8822767/dark-sky-weather-app-crowdsourced-data https://www.theverge.com/2015/6/22/8822767/dark-sky-weather-...

xgulfie 2y ago
I'm still grumpy about apple buying and shuttering darksky
thatcat 2y ago
They stopped using it during later years.
counters 2y ago
Not really; it was a gimmick. They used standard forecast post-processing techniques to bias correct global/regional weather models. There is virtually no evidence they actually used device data in this process.

phillipseamore 2y ago

"Collecting and processing of barometric data from smartphones for potential use in numerical weather prediction data assimilation" https://rmets.onlinelibrary.wiley.com/doi/10.1002/met.1805 https://rmets.onlinelibrary.wiley.com/doi/10.1002/met.1805 https://github.com/dmidk/smaps https://github.com/dmidk/smaps