Gravity Field of the Southern Ocean Data Files

September 23, 1992


All binary files SOGRAV[2].[BIN,DOS] have logical records of 3601 
4-byte floating-point numbers.

Data in SOGRAV.BIN start at 72.00 deg. S latitude, 0.0 deg. E 
longitude, proceeding 0.1 deg Eastward for each point. After point 
3601 (360.0 deg E), the next record begins 0.05 deg. north, or 
71.95 deg. S latitude, and so on to the end of the file at 60.00 S 
lat. Data records are in "bottom-upward," or S->N order.

The files SOGRAV2.[BIN,DOS] have the same records as above, but in 
reverse ("top-down," or N->S) order, starting at 60.00 deg S and 
stepping by 0.05 deg. southward to 72.00 deg. The data points 
within the records are still in west-to-east (L-R) order.

Data Format:

SOGRAV.BIN: Floating Point Binary, hi-byte-first (Sun, Macintosh 
format). Record order S->N. Logical record length = 14404 bytes.

SOGRAV2.BIN: Floating Point Binary, hi-byte-first (Sun, Macintosh 
format). Record order N->S. Logical record length = 14404 bytes.

SOGRAV2.DOS: Floating Point Binary, lo-byte-first (PC, VAX 
format). Record order N->S. Logical record length = 14404 bytes.

SOGRAV.ASC: ASCII text, fields as follows:
Byte 1-7: Longitude, byte 8-14: Latitude, byte 15-28: gravity 
anomaly, Mgal, byte 29-30: <CR><LF>. Logical record = 30 bytes.

0        1         2         3
123456789012345678901234567890
    0.0  -72.00  -999.000000
    0.1  -72.00  -999.000000
    0.2  -72.00  -999.000000
    0.3  -72.00  -999.000000
    0.4  -72.00  -999.000000
    0.5  -72.00  -999.000000
    0.6  -72.00  -999.000000
    0.7  -72.00  -999.000000
    0.8  -72.00  -999.000000
    0.9  -72.00  -999.000000

where -999.00000 indicates absent data. Data order is as in 
SOGRAV.BIN (W->E, then S->N).