I'm trying to export Surface Reflectance data from Landsat 7 through Google Earth Engine. However, the dimensions don't seem to match up: previously with NVDI data, I printed the image collection size divided by the number of snapshots, temporal resolution of 8 days, per year to check that it had 16 years worth of data.
imgcoll = ee.ImageCollection('LANDSAT/LE07/C01/T1_8DAY_NDVI') \ .filterDate('2002-12-31','2018-12-31') imgcoll.size().getInfo() / 46 16
Trying to print the image collection size of Surface Reflectance data yields a confusing result. The wikipedia page on Landsat 7 indicates a temporal resolution of 16 days, which should mean that when dividing by 23, the result should be 16 years (2003-2018) as well.
imgcoll = ee.ImageCollection('LANDSAT/LE07/C01/T1_SR') \ .filterDate('2002-12-31','2003-12-31') imgcoll.size().getInfo() / 23 64430.782608695656
Why is that the case, and what is the proper way of exporting Landsat 7 Surface Reflectance data? In addition, has the Landsat 7 dataset from Google Earth Engine been corrected for the SLC failure? This was not a problem encountered with exporting MODIS data.