Trimble R10 - Page 145

TrimbleR10ReceiverWebHelp
roverGNSSreceivertoprovidesub‐meterpositionaccuracy.Therover
receivercanbeatalongrange(greaterthan100kms(62miles))fromthe
basestation.
rover
AroverisanymobileGNSSreceiverthatisusedtocollectorupdatedatain
thefield,typicallyatanunknownlocation.
Rovingmode
Rovingmodeappliestotheuseofaroverreceivertocollectdata,stakeout,
orcontrolearthmovingmachineryinrealtimeusing
RTKtechniques.
RTCM
RadioTechnicalCommissionforMaritimeServices.Acommissionestablished
todefineadifferentialdatalinkforthereal‐timedifferentialcorrectionof
rovingGNSSreceivers.TherearethreeversionsofRTCMcorrection
messages.AllTrimbleGNSSreceiversuseVersion2protocolforsingle‐
frequencyDGPStypecorrections.Carrierphasecorrections
areavailableon
Version2,oronthenewerVersion3RTCMprotocol,whichisavailableon
certainTrimbledual‐frequencyreceivers.TheVersion3RTCMprotocolis
morecompactbutisnotaswidelysupportedasVersion2.
RTK
real‐timekinematic.A
real‐timedifferentialGPSmethodthatusescarrier
phasemeasurementsforgreateraccuracy.
SBAS
Satellite‐BasedAugmentationSystem.SBASisbasedondifferentialGPS,but
appliestowidearea(
WAAS/EGNOS/MSAS)networksofreferencestations.
Correctionsandadditionalinformationarebroadcastusinggeostationary
satellites.
signal‐to‐noiseratio
SNR.Thesignalstrengthofasatelliteisameasureoftheinformationcontent
ofthesignal,relativetothesignal’snoise.ThetypicalSNRofasatelliteat30°
elevationisbetween47and50dBHz.
skyplot
ThesatelliteskyplotconfirmsreceptionofadifferentiallycorrectedGNSS
signalanddisplaysthenumberofsatellitestrackedbytheGNSSreceiver,as
wellastheirrelativepositions.
SNR
See
signal‐to‐noiseratio.
Source‐table
TheNTripCastermaintainsasource‐tablecontaininginformationonavailable
NTripSources,networksofNTripSources,andNTripCasters,tobesenttoan
NTripClientonrequest.Source‐tablerecordsarededicatedtooneofthe
following:
 dataSTReams(recordtypeSTR)
 CASters(recordtypeCAS)
 NETworksofdata
streams(recordtypeNET)
AllNTripClientsmustbeabletodecoderecordtypeSTR.DecodingtypesCAS
andNETisanoptionalfeature.Alldatafieldsinthesource‐tablerecordsare
separatedusingthesemicoloncharacter.
triplefrequencyGPS
Atypeofreceiverthatusesthreecarrierphasemeasurements(
L1,L2,and