A simple apk (tested and written on vf696 android 5.1 'phone) that includes daytime shower calendar.
Version h4 (v3 signature, cert md5: 8741357d4dd11e5c4a3ca328594fc8b8) 18th January 2023
This program requires a fast Android at least 800px400 screen.
This apk stopped working on Android 5 and Android 6 Some years ago with a 'SSL java Trust Anchor Error' FIXED:
By installing a (self signed) ISRG Root X1 , it can work again for DJ4PK cluster and wspr.
[With this program, the Android UI 'back' button is more reliable with Android 5 than Android 6, for Android 6, try the
UI 'back' button and then if no response use the onscreen < touch
For slower devices, especially in the satellite ground tracks screen, try holding the << or >> buttons down for longer?]
This program (for old Android 5 or 6) besides meteor calender also
* Connects to cluster and plots 6m and 10m
* Plots satellite ground tracks and visibility
* Shows satellite RAAN changes
* Plots GPS (need root to set time)
* Plots wspr
* Mini orrey (out to Jupiter)
* Moon and Jupiter visibility
* Ra/Dec plots
* Shows sunrise/sunset on circle map
* calculates circle map (high definition) for location
* Plots helion and Sporadic sources
* shows sun and moon terminators
* can select map types and plot colours
* has Notes section to explain terms used
A 'parse Error' (on install) could indicate a v4 signature required?
26/6/2025 Works fine with Android 7 (prevent program from being backgrounded ?), run the program twice;
first time type in grid locator for 'placename'
second time, download beacon list (to enable bearings menu), then calculate a cirle map...
More than just the X1 was required, so I installed a bunch of certificates, (the E5 being required).
bunch of certificates.zip
The CRC here apply to these ones only, since a different cross sign would produce a different certificate.
Only install certificates from a trusted source (not this webpage, but from the Issuer; 'Let's Encrypt').
Installing arbitrary certificates can prevent settings>security from working on Android (6).
Build Superregenerative converter
Build Balanced line tuner
Build 3rd Order loop filter
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This apk stopped working on Android 5 and Android 6 Some years ago with a 'SSL java Trust Anchor Error' FIXED:
By installing a (self signed) ISRG Root X1 , it can work again for DJ4PK cluster and wspr.
[With this program, the Android UI 'back' button is more reliable with Android 5 than Android 6, for Android 6, try the
UI 'back' button and then if no response use the onscreen < touch
For slower devices, especially in the satellite ground tracks screen, try holding the << or >> buttons down for longer?]
This program (for old Android 5 or 6) besides meteor calender also
* Connects to cluster and plots 6m and 10m
* Plots satellite ground tracks and visibility
* Shows satellite RAAN changes
* Plots GPS (need root to set time)
* Plots wspr
* Mini orrey (out to Jupiter)
* Moon and Jupiter visibility
* Ra/Dec plots
* Shows sunrise/sunset on circle map
* calculates circle map (high definition) for location
* Plots helion and Sporadic sources
* shows sun and moon terminators
* can select map types and plot colours
* has Notes section to explain terms used
A 'parse Error' (on install) could indicate a v4 signature required?
26/6/2025 Works fine with Android 7 (prevent program from being backgrounded ?), run the program twice;
first time type in grid locator for 'placename'
second time, download beacon list (to enable bearings menu), then calculate a cirle map...
More than just the X1 was required, so I installed a bunch of certificates, (the E5 being required).
bunch of certificates.zip
The CRC here apply to these ones only, since a different cross sign would produce a different certificate.
Only install certificates from a trusted source (not this webpage, but from the Issuer; 'Let's Encrypt').
Installing arbitrary certificates can prevent settings>security from working on Android (6).
Build Superregenerative converter
Build Balanced line tuner
Build 3rd Order loop filter
Build Mega16 Text Beacon keyer