NASA EOS Project

AM1EPHNE is the Terra Near Real Time (NRT) 2-hour spacecraft Extrapolated ephemeris data file in native format. The file name format is the following: AM1EPHNE.Ayyyyddd.hhmm.vvv.yyyydddhhmmss where from left to right: E = Extrapolated; N = Native format; A = AM1 (Terra); yyyy = data year, ddd = Julian data day, hh = data hour, mm = data minute; vvv = Version ID; yyyy = production year, ddd = Julian production day, hh = production hour, mm = production minute, and ss = production second. Data set information:http://modis.gsfc.nasa.gov/sci_team/...AM1EPHNE 是面向Terra航天器的近实时（Near Real Time, NRT）2小时级外推星历数据文件，采用原生格式存储。其文件名格式如下：AM1EPHNE.Ayyyyddd.hhmm.vvv.yyyydddhhmmss，各字段从左至右的含义依次为：E代表外推（Extrapolated），N代表原生格式（Native format），A代表AM1（即Terra航天器）；yyyy为数据年份，ddd为儒略历数据日，hh为数据小时，mm为数据分钟；vvv为版本标识（Version ID）；后续的yyyy为生成年份，ddd为儒略历生成日，hh为生成小时，mm为生成分钟，ss为生成秒数。数据集相关信息可访问：http://modis.gsfc.nasa.gov/sci_team/...