5 Accessing Spectra 



Frequency-direction spectra computed from Harvest Platform data are cur- 

 rently stored on electro-optical media in binary, unformatted form, and so are not 

 "on line" in the sense of common data networks. Nonetheless, an individual inter- 

 ested in obtaining these spectra can readily do so by communicating with the FRF 

 via: 



Surface mail Chief, Field Research Facility 



1261 Duck Road 

 Kitty Hawk, NC 27949-4472 



Telephone (919)261-3511 



FAX (919)261-4432 



or any of the following internet addresses: 



C.Long@duck.wes.army.mil 

 C.Baron@duck.wes.army.mil 

 W.Birkemeier@duck.wes.army.mil 



On request, all or part of the spectral database can be converted to 80-column 

 ASCII format and copied either to portable magnetic tape media or to an anony- 

 mous file transfer protocol (ftp) account that is accessible through common com- 

 puter networks. Data will be in the form of a set of files with one spectral esti- 

 mate per file. Files will be named HPyymmddhhmm.ASC, where yymmdd repre- 

 sents year, month, and day, and hhmm represents hour and minute (GMT) of a 

 collection start time from which a spectrum is estimated. For convenience, dates 

 and times of parameter listings in Appendix A are in the yymmdd and hhmm mne- 

 monic forms. 



On receipt by a user, spectral data files can be read using the format statements 

 shown in the sample FORTRAN program listed in Appendix C. The header of 

 the FORTRAN program listing identifies all the variables contained in a data file. 

 For reference, Appendix D is a listing of a sample data file, and shows locations 

 of variables within the file. 



Chapter 5 Accessing Spectra 1 9 



