Grass SAT is powered by a sophisticated grass growth model that monitors over 20 different data sets including daily weather, soil, Earth observation (from satellites) and management activities (that users enter into the tool themselves). The model makes hundreds of complex calculations many times every day, from which valuable information can be derived about soil properties, grass characteristics and the grass growth rates (kg DM/ha).
Although satellites pass overhead every day, we can only use a satellite image when there are no clouds or haze obscuring the view, so the frequency of satellite updates may vary. Don’t worry though, the satellite image is just one component. As long as you add activities, the grass growth model will continue to provide accurate grass cover values.
Adding activities such as grazing or cutting is important as it assures accuracy of values in between satellite image updates. This is now easier with release of a mobile App. You can use the mobile App to add activities real-time in the field with the ability to cache data and automatically synchronise with Grass SAT when back in range. You can set default values for all your common tasks. Just select the relevant paddock (or multiple paddocks) and click ‘Add Activity’. The grass cover values will then be updated. The App is available for iPhone and Android users and can be downloaded from the Google Play Store or the Apple App Store by searching for ‘Grass Sat’.
Grass cover values are available real-time and dynamically updated from multiple data sources enabling dynamic decision making.