DES( Data Encryption Standard)算法，于1977年得到美國(guó)政府的正式許可，是一種用56位密鑰來(lái)加密64位數(shù)據(jù)的方法。DES算法以被應(yīng)用于許多需要安全加密的場(chǎng)合。（如：UNIX的密碼算法就是以DES算法為基礎(chǔ)的）。
HDFDUMP and BRFDUMP are utility programs developed for use with MISR data
files. HDFDUMP will extract data from a MISR file in the HDF-EOS grid format
(MISR Level 1B2 and Level 2 files) and writes unformatted binary files. BRFDUMP
calculates radiances and bidirectional reflectance factors (BRF) from MISR Level 1B2
files and creates unformatted binary files.
