NavCom SF-3050 Rev.I - Manual (Page 192)

SF-3050 GNSS Product User Guide – Rev I
G-173
L1 carrier frequency the primary L-Band carrier used by GPS satellites to transmit
satellite data. The frequency is 1575.42MHz. It is modulated by C/A code, P-code, or Y-
code, and a 50 bit/second navigation message. The bandwidth of this signal is 1.023MHz.
L2 carrier frequency the secondary L-Band carrier used by GPS satellites to transmit
satellite data. The frequency is 1227.6MHz. It is modulated by P-code, or Y-code, and a
50 bit/second navigation message. The bandwidth of this signal is 10.23MHz.
L2C carrier frequency a L-Band carrier used by GPS satellites to transmit satellite data.
The frequency is 1227.6MHz. It is identical to L2 carrier frequency except that it is also
modulated by C/A code, which provides a narrower band and is easier to track.
L5 carrier frequency a L-Band carrier used by GPS satellites to transmit satellite data.
The frequency is 1176.45MHz. Like L2, L5 better characterizes the ionosphere and the
atmosphere.
lat see latitude.
latitude (lat) the north/south component of the coordinate of a point on the surface on the
earth; expressed in angular measurement from the plane of the equator to a line from the
center of the earth to the point of interest. Often abbreviated as Lat.
LED acronym for Light Emitting Diode.
LEMO a type of data or power connector.
LES Land Earth Station the point on the earth’s surface where data is up linked to a
satellite.
logging interval the frequency at which positions generated by the receiver are logged to
data files.
lon see longitude.
longitude (long) the east/west component of the coordinate of a point on the surface of
the earth; expressed as an angular measurement from the plane that passes through the
earth’s axis of rotation and the 0° meridian and the plane that passes through the axis of
rotation and the point of interest. Often abbreviated as Long.
Mean Sea Level (MSL) a vertical surface that represents sea level.
meridian one of the lines joining the north and south poles at right angles to the equator,
designated by degrees of longitude, from 0° at Greenwich to 180°.
meteorological (.YYm) files one of the three file types that make up the RINEX file
format. Where YY indicates the last two digits of the year the data was collected. A
meteorological file contains atmospheric information.
MSAS (MTSAT Satellite-based Augmentation System) a Japanese satellite system
that provides a set of corrections for the GPS satellites, which are valid for the Japanese
region. They incorporate satellite orbit and clock corrections.
MSL see Mean Sea Level.
Multi-Frequency-GNSS Receiver a type of receiver that is capable of using multiple
signals, for example, GPS (L1, L2, L2C, L5), GLONASS (G1, G2), StarFire L-band, SBAS
(WAAS, EGNOS, MSAS, GAGAN), and QZSS signals. The use of multiple signals