# Solar Flux NOAA

> Solar Flux NOAA (iPhone/iPad app by Dave Massey.)

- Source: https://appshunter.io/ios/app/solar-flux-noaa/id1029584287 (this page in markdown: same URL + `.md`)
- Developer: [Dave Massey](https://appshunter.io/developer/1029584286)
- Category: Utilities, Weather
- Price: Free
- Age rating: 4+
- Requires: iOS 12.2 · 2 MB
- Languages: English
- Released: 2015-08-19
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/solar-flux-noaa/id1029584287/reviews.md

## What is Solar Flux NOAA?

This application provides the average "Radio Solar Flux" (sfu) (10^-22 W/m^2/Hz) units obtained from NOAA (US Government Weather). Solar Flux is used in space weather forecasting, antenna figure of merit testing, and other scientific applications.  The flux values for each radio frequency are available by separate measurement stations or are by default averaged amongst the worlds measurement station in near real-time.  The stations used are: 
AU - Learmonth Australia
IT - San Vito Italy
US - Sagamore Hill United States
CA - Penticton Canada
HI - Palehua Hawaii United States

Note that all stations do not report all frequencies on every report.  If the reports are not yet available for today on a particular radio frequency when the user runs the application, the app will display yesterdays values.  Note that background colors are changed to indicate; Green=Todays data; Yellow=Yesterdays data; Red=No data.

Comments, suggestions and improvements are welcome.
Dave


## Version history (last 5 releases)

### 2.1 — 2020-05-18

Updated to latest iOS, Dark mode implementation, and minor bug fixes.

### 2.0 — 2019-09-13

Updated NOAA server location and allowed for server changes if needed. Updated to latest IOS.

### 1.2 — 2015-10-12

V1.2 allows for selection of individual measurement stations data to be displayed.
All device orientations are now supported.
Data backgrounds are now color coded (Green=Todays data; Yellow=Yesterdays data; Red=No data)
Documentation alert message legend has been added

### 1.1 — 2015-09-03

1-Added iPad to the platform
2-Updated color schemes
3-Added a timestamp to note the last time of update
4-Added error catching and Alert messages
5-Added "busy" spinning wheel for slow Internet
6-Fixed potential crash issue with array out of bounds

### 1.0 — 2015-08-19

No release notes.

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All apps by Dave Massey: https://appshunter.io/developer/1029584286

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*