Over the years the OMNI compilation of multisource, hourly solar wind field, plasma, and energetic particle data has been accessible via a diversity of pathways ranging from paper data books to a WWW interface called OMNIWeb. NSSDC has just added a new pathway to OMNI data: anonymous FTP.
FTP access is frequently the most effective pathway when a user's need is fast access to and downloading of full data files. The OMNIWeb interface to OMNI actually allows users the greater functionalities of specifying individual parameters and time spans for graphical or numeric display and downloading.
The ANON.COHO directory on nssdc.gsfc.nasa.gov has long supported FTP access to principal-investigator-provided data files from numerous deep-space spacecraft. NSSDC has added a subdirectory, COHO.OMNI, to provide FTP access to annual files of OMNI data in ASCII format. This subdirectory contains a documentation file, OMNI.DOC, which gives detailed format statements, coordinate system information, and the like. OMNI.DOC discusses the two versions of the annual OMNI files, which require about 0.7 and 2.2 megabytes, respectively.