To export time series data from Google Earth Engine to ASCII format for use in TimeSat, you can follow these general steps:
Get NDVI Time Series from Google Earth Engine:Use Google Earth Engine to fetch the NDVI time series data for your region of interest. You can use the ee.ImageCollection and ee.Reducer to calculate the mean NDVI for each image in the collection.Here's a simplified example in JavaScript: var collection = ee.ImageCollection("MODIS/006/MOD13Q1") .select("NDVI"); var meanNDVI = collection.reduce(ee.Reducer.mean());
Export Data to Google Drive:Use the Export.image.toDrive function to export the data to Google Drive. Specify the region, scale, and other parameters as needed. Export.image.toDrive({ image: meanNDVI, description: 'NDVI_TimeSeries', scale: 250,region: yourRegionOfInterest, maxPixels: 1e13 });
Download from Google Drive:Once the export is complete, you can download the exported file from Google Drive. The file will be in GeoTIFF format.
Convert GeoTIFF to ASCII:Use a GIS software or a tool like GDAL to convert the GeoTIFF file to ASCII format. You can use the gdal_translate command in a terminal: gdal_translate -of XYZ input.tif output.xyzThis command converts the GeoTIFF file to XYZ ASCII format.
Now, you have an ASCII file that can be used as input to TimeSat. Adjust the steps based on your specific requirements and the dataset you are working with.