GNSS

GSI IGS FTP Download Site

Net Adjustment FREE SOFT

GPS測位計算プログラム入門

GPSTools

GPS Wavelength

L1 19cm

L2 24.4cm

二重位相差—-衛星と受信機の時計誤差消去

三重位相差—-二重位相差の差

Precision of Positioning

Code-Phase コード

C/A civil

P military

Carrier-Phase 搬送波位相

Network RTK-VRS or FKP

GPS Data Loggers

M-241 Holux

QZSS 193

QZS-L1-SAIF 183

GNSS-Lab Tool (gLAB)

Almanac (a few hundreds m~ a few km) per Week

Broadcast Ephemeris (2~3m) per 2 hours

The IGS precise Ephemeris (High)

Hot Start

Warm Start

Cold Start

Three Dimensional Network Average Method