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Satellite imaging is widely used in monitoring weather patterns and interpreting satellite images. The limited access to weather satellite image data in real-time is still major issues faced by satellite enthusiasts. NOAA 18 and NOAA 19 weather satellites provide free accessible weather data continuously through Automatic Picture Transmission at 137.9125 MHz and 137.1000 MHz frequencies. In this research the data acquisition system is designed with the help of a Quadrifilar Helix antenna and RTL-SDR. In order to receive both frequencies, the Quadrifilar Helix antenna at 137,5 MHz is designed. Recording, decoding, editing, and viewing of Automatic Picture Transmission signals using WXtoImg software. The result showed that the weather satellite image receptions are sufficiently clear and descriptive, although there are 0.0685% frequency offsets of Automatic Picture Transmission signal reception on NOAA 18 and 0.0686% on NOAA 19.

Indonesian agricultural system has improved significantly along with technological developments. However, as a result of technological developments, agricultural land becomes narrow. To overcome the increasingly narrow farming land, start developing systems suitable for planting with aeroponic system. Unpredictable environmental climate changes can disrupt productivity growth and create low quality crops. To solve this problem, monitoring system based on Android needed. This system is used to monitor in parameters change, the parameters include temperature and humidity. Android-based monitoring system uses java programming and is open source, besides the user can monitor the development of spinach plants, by looking at data that has been stored into the database so that users can know the development of the plant. This application can be accessed via smartphone with android operating system as a client server.