San Marco DBI 21-s Data NSSDC-ID: 88-026A-01C This San Marco D/L Drag Balance Instrument (DBI) data set was provided by Dr. A. Hedin. The data set was generated from the original DBI data (88-026A-01A) by averaging over all measurements within a 21-second interval and by using the PI-provided software to generate orbit parameters. The data are in ASCII format and each data record includes the date, time, total density, error, altitude, latitude, longitude, and local solar time. Further details on the spacecraft, experiment, data sets at NSSDC, and related WWW sites can be found on the San Marco flight project page from NSSDC's space physics homepage: http://nssdc.gsfc.nasa.gov/space/ Acknowledgement: Use of these data in publications should be accompanied at minimum by acknowledgements of the National Space Science Data Center and the responsible Principal Investigator. dieter.bilitza@gsfc.nasa.gov, October 21, 1999