Example - Leica GR30 Online Help Manual

Options:
GP = GPS only
GL = GLONASS only
GA = Galileo only
BD = BeiDou only
GN = Global Navigation Satellite System
•
LVM = name of the message
hhmmss.ss UTC time of velocity (Check official NMEA section 6.2.1)
mmddyy UTC date of velocity
E.EEEE East component of the receiver's velocity, [m/s]
N.NNNN North component of the receiver's velocity, [m/s]
U.UUUU Up component of the receiver's velocity, [m/s]
v.v Variance of the East velocity component, [m2/s2]
v.v Variance of the North velocity component, [m2/s2]
v.v Variance of the Up velocity component, [m2/s2]
c.c Covariance between the East and North velocity components, [m2/s2]
c.c Covariance between the East and Up velocity components, [m2/s2]
c.c Covariance between the Up and North velocity components, [m2/s2]
q.q 3D velocity Component Quality (CQ
xx Number of satellites whose observations have been used to calculate the velocity values
*hh Checksum
<CR>
Carriage Return
<LF>
Line Feed
CQ stands for Component Quality and is given by the sum of the standard deviation and of the contribution of empirical assumptions.
[1]
Therefore, CQ accounts for measurements noise, environmental conditions (e.g. tropospheric and ionospheric delay) and for the
influence of the different constellations on the components.

Example

User defined Talker ID = GN
$GNLVM,113805.50,030215,0.0011,0.0021,0.0015,0.0023,0.0040,0.0092, 0.00012,0.00015,0.00035,0.043561,19*47
B15: LDM - Leica Displacement Measurement
Syntax
$--LDM,hhmmss.ss, mmddyy, hhmmss.ss , mmddyy, E.EEEE, N.NNNN, U.UUUU, v.v, v.v, v.v, c.c , c.c , c.c, q.q, xx, a, a, a
*hh<CR><LF>
Description of fields
Field Description
$--LDM Header including talker ID:
•
-- = alphanumeric characters identifying the talker
), [m/s]
[1]
Appendix B: NMEA Messages
257