A more detailed listing of parabolic features is in Campbell et al. The parabolic features listed in our database are a subset of those in Campbell et al. We have only included those that are undisputable parabolic features, that are obviously related to the crater, and that show up clearly in the SAR imagery. Their measurements are quite similar to ours where the databases overlap, but they have classified many craters as peak ring craters that we classified as craters with multiple peaks. Entries in Main Database Below we summarize measurements made on each crater in the database.
Parentheses indicate notation used in tables.
The minimum possible error of any distance measurement is therefore 122.5 m. However, the choice of endpoints for a particular measurement is subjective, and the repeatability of this choice dictates the true error in a measurement. To assess this we repeated our analysis several times for a subsample of the database and then found the standard deviation for each measurement type. If the error was constant with increasing crater diameter then we give the absolute average standard deviation below. However, some measurements had errors that systematically increased with increasing crater diameter, so that it is more appropriate to give the average percentage deviation.