END Convert binary data into hexadecimal data and save in a text file Is auto-errorcorrection mechniasm set? Print WARNING! Add required amount of padding bits. Print ERROR Take the assist. data from previous measurement report! Are padding bits required for the RRLP packets? Generate the binary RRLP packet. Are the most recent data valid after the conversion? Was the download successful? Is every variable set in the configuration file? Open the file and read the assist. data. Parse and extract the assist. data. Convert values by the RRLP standard! Load the URLs and other parameters Does the config. file exist? Are the downloaded data older than 1 hour? Download Almanac, Ephemeris with other assist. data! Does the assist. data Rinex file exist? RRLP Assist. data gener. No Yes Yes Yes Yes Yes No No No Yes No No Yes No No Yes