metrcal.apk version h4

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.  1st Fer 2021 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).  boc 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