Trimble R10 - Page 144

TrimbleR10ReceiverWebHelp
NTripClient
AnNTripClientwillbeacceptedbyandreceivedatafromanNTripCaster,if
theNTripClientsendsthecorrectrequestmessage(TCP/UDPconnectionto
thespecifiedNTripCasterIPandlisteningport).
NTripServer
TheNTripServerisusedtotransferGNSSdataofanNTripSourcetothe
NTripCaster.AnNTripServerinitssimplestsetupisacomputerprogram
runningonaPCthatsendscorrectiondataofanNTripSource(forexample,
asreceivedthroughtheserialcommunicationportfromaGNSSreceiver)to
the
NTripCaster.
TheNTripServer‐NTripCastercommunicationextendsHTTPbyadditional
messageformatsandstatuscodes.
NTripSource
TheNTripSourcesprovidecontinuousGNSSdata(forexample,RTCM‐104
corrections)asstreamingdata.AsinglesourcerepresentsGNSSdata
referringtoaspecificlocation.Sourcedescriptionparametersarecompiled
inthesource‐table.
OmniSTAR
TheOmniSTARHP/XPserviceallowstheuseofnewgenerationdual‐
frequencyreceiverswiththeOmniSTARservice.TheHP/XPservicedoesnot
relyonlocalreferencestationsforitssignal,bututilizesaglobalsatellite
monitoringnetwork.Additionally,whilemostcurrentdual‐frequencyGNSS
systemsareaccuratetowithina
meterorso,OmniSTARwithXPisaccurate
in3Dtobetterthan30cm.
PDOP
PositionDilutionofPrecision.PDOPisa
DOPvaluethatindicatesthe
accuracyofthree‐dimensionalmeasurements.OtherDOPvaluesinclude
VDOP(verticalDOP)and
HDOP(HorizontalDilutionofPrecision).
UsingamaximumPDOPvalueisidealforsituationswherebothverticaland
horizontalprecisionareimportant.
POE
PowerOverEthernet.ProvidesDCpowertothereceiverusinganEthernet
cable.
postprocessing
Postprocessingistheprocessingofsatellitedataafteritiscollected,inorder
toeliminateerror.Thisinvolvesusingcomputersoftwaretocomparedata
fromtheroverwithdatacollectedatthebasestation.
QZSS
Quasi‐ZenithSatelliteSystem.AJapaneseregionalGNSSeventuallyconsisting
ofthreegeosynchronoussatellitesoverJapan.
real‐timedifferential
GPS
Alsoknownas
real‐timedifferentialcorrectionorDGPS.Real‐time
differentialGPSistheprocessofcorrectingGPSdataasyoucollectit.
Correctionsarecalculatedatabasestationandthensenttothereceiver
througharadiolink.Astheroverreceivesthepositionitappliesthe
correctionstogiveyouaveryaccuratepositionin
thefield.
Mostreal‐timedifferentialcorrectionmethodsapplycorrectionstocode
phasepositions.
WhileDGPSisagenericterm,itscommoninterpretationisthatitentailsthe
useofsingle‐frequencycodephasedatasentfromaGNSSbasestationtoa