Lassen SQ, Справочное руководство

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Lassen SQ GPS Receiver 1 4 1
NMEA 0183 C
Note – Spaces are only be used in variable text fields.
Note 2 – Units of measure fields are appropriate characters from the
Symbol column (see Table C.2), unless a specified unit of measure is
indicated.
Note 3 – Fixed length field definitions show the actual number of
characters. For example, a field defined to have a fixed length of 5
HEX characters is represented as hhhhh between delimiters in a
sentence definition.
Defined Some fields are specified to contain pre-defined constants,
most often alpha characters. Such a field is indicated in this
standard by the presence of one or more valid characters.
Excluded from the list of allowable characters are the
following that are used to indicated field types within this
standard:
“A”, “a”, “c”, “hh”, “hhmmss.ss”, “llll.ll”, “x”, “yyyyy.yy”
Numeric Value Fields
Variable x.x Variable length integer or floating numeric field. Optional
leading and trailing zeros. The decimal point and associated
decimal-fraction are optional if full resolution is not required
(example: 73.10=73.1=073.1=73).
Fixed HEX hh Fixed length HEX numbers only, MSB on the left
Information Fields
Fixed Alpha aa Fixed length field of upper-case or lower-case alpha
characters
Fixed number xx Fixed length field of numeric characters
Table C.2 Field Type Summary (Continued)
Type Symbol Definition