aprs.fi vs Light Pollution Map

An additional in-app subscription is needed for some features, so please read this application description fully before purchasing. Navigate to addresses with clear step-by-step instructions. Obtain immediate, real-time access to current APRS position information, weather reports, telemetry graphs, and more. Zoom and browse around the world and see stations immediately – no waiting. • Route guidance / driving directions • Search callsigns and addresses, with quick search-as-you-type and search history features • Track multiple stations at the same time • Filter information shown on the map (weather stations, AIS, custom filters) • View weather, telemetry and statistic graphs • Beacon your position on aprs.fi • Attach to a transceiver with a wireless connection to a BLE TNC, receive and transmit position beacons without the Internet • Runs directly on top of the reliable and fast aprs.fi database • Tested to work great on all currently-supported iPhone and iPad models • Supports iOS 14/15/16/17/18/26 • Dark Mode support for an ergonomic viewing experience in low-light environments • High-resolution graphics for Retina and Retina HD displays with full APRS symbol set Buy the app – get the web site for free! Some new features require a subscription. All old and some new features will be available without a subscription fee. These features are currently included in the Extra Features subscription package: • APRS text messaging with a modern instant messenger-like experience, supports international text and emojis • High-performance software DSP modem • APRS-IS beaconing, with up to 10 callsign profiles • Offline maps • RX iGate functionality • Long time ranges in map and graph views Note: Continued use of GPS running in the background can dramatically decrease battery life. GPS is not required for viewing APRS information. Terms of service: https://aprs.fi/page/app_terms Privacy policy: https://aprs.fi/page/app_privacy

The map displays VIIRS/World Atlas/Clouds/Aurora/IAU observatories and the user SQM measurements. The primary use is to show VIIRS/DMSP data in a friendly manner, but over time it also included some other interesting overlays that concern light pollution like SQM/SQC, World Atlas 2015 zenith brightness, clouds, aurora and IAU observatories. If you have a permanent SQM reader installed you can add it to the map by sending me an e-mail. Please send comments and requests for new features via email (look under help) Functionalities: - VIIRS, Sky Brightness, World Atlas 2015, Cloud coverage and Aurora forecast layers - VIIRS and Sky Brightness layers can be displayed in color blind friendly colors - Road & Satellite base maps - Cloud animation for the last 12 hours - Get detail radiance and SQM values from layers at a click. For Sky brightness/World Atlas 2015, you also get Bortle class estimation. - SQM, SQM-L, SQC, SQM-LE, SQM readings submitted by users - International dark sky parks overlay - Submit your own SQM (L) readings - Observatories layer - Save your favorite locations - Distance measurement tool with azimuth angle report - All-sky view of light pollution with real horizon - Offline mode (Sky brightness map and a base map are saved to your device, so it will be displayed when you are offline)