Ham Solar | HAP Chart

Muhammad Zakwan

About this app

[INTRO]

Ham Solar is using code from Paul, N0NBH website. Its requires internet connection.

[HAP CHART]

Hourly Area Prediction (HAP) chart feature is also provided by this app. Its specifies the Maximum Usable Frequency (MUF) for HF communications between the base specified and any location on the map. The colors represent the MUF for communications between that location on the map and the base selected.

Thus, if communications are required to or from Minneapolis, a HAP chart for Minneapolis should be used. The other end of the circuit is then found on the HAP chart and the color at that location gives the MUF for that circuit.

HAP charts are charts based on current ionospheric conditions observed with ionosondes in the region of interest. This chart is only valid for the current hour due to the highly variable nature of the ionosphere.

It is also helpful to view HAP chart propagation from the perspective of distant locations. In this manner you can determine if they are able to reach the Midwest with a usable MUF.

If you love this app, please kindly to rate it and give donation to Paul. Just inform me via email if you find any problems.This app is fully designed by using MIT App Inventor 2.

Regards, 9W2ZOW.

Ratings and reviews

So, there are a number of problems that made me sorry I got this. First, the MhZ keys on top of the graphs are so small you have to use a magnifying glass to see it on my cell phone. And, you cannot zoom in using the spread/pinch technique you can use on EVERY other app I've installed on my phone. Next, there are no dialogue boxes/pop-ups that explains ANYTHING! It'd be nice to know how to interpret the propagation graph. The contact/mode visual suffers also from micro print... Just sucks!

Thank you for your quick response to my post. I truly appreciate your time and interest. To detail my issues; I have had your HAM SOLAR app for quite awhile and really like it. Recently the app just stopped working. By stopped working I mean it would not load beyond the initial splash screen showing two globes, the refresh and donate buttons. After rebooting my phone several times with no joy, I deleted the app and reinstalled it with the same results. I also tried to reconnect from a different location on the other side of town with the same (or lack of) results. Additionally, While reloading the HAM SOLAR app, I saw another of your apps, HAM CONTEST, which I thought was a great idea. I downloaded the app and found the exact same issues noted above. As you might imagine, this has been very frustrating when I also have the HF PROPAGATION app loaded on my phone and it is, and has been working FLAWLESSLY for months. Thanks again for your time and the quick response '73 Steve Sutker K4LEG

This app used to work very well giving a map showing dx activity, but recently it appears the app lost it's webpage and redirects to a not found page. Was great whole it lasted. Other than that the band condx page is still working.

What’s new

v2.4.6 (23 July 2024)
- Fix list code.
- Update font typeface.
- Update new app icon.
- Update target API level requirement.

v2.4.5 (14 November 2023)
- Add follow url to Australian Space Weather Services.
- Add follow url to HrdLog.
- Add follow url to QRZ callsign database.
- Fix HF band condition code.
- Fix HAP chart map code.
- Fix HrdLog QSO map code.
- Fix QRX cluster code.
- Fix setting code.
- Remove clock component.

*** Visit Url zmd94.com/solar to see full changelog.