MAGNET GPS Station - Photo by Geoff Blewitt

Station ID : LTAC

Station operator information from: RINEX headers

When using products from this system please cite Blewitt et al., (2018) for the processing plus also the citation for the original data.


Latitude: -18.051 degrees

Longitude: -70.277 degrees

Height: 482.823 meters

Time Series Data

(ascii text)
24 Hour Final Solutions


tenv3 or tenv




5 Minute Final Solutions


kenv tar files for download

Quality Assurance (QA) Files


.qa.gz file download

5 Minute Troposphere Solutions

Tot./Wet Zenith Delay, etc.

tar file download

New!: Loading Predictions.
See this README file for explanation.


tenv3 file with extra columns

Readme Files:

tenv3 format, tenv format, xyz format,
kenv format, trop format, QA file format,
Loading triplet enhanced tenv3 files
(Note: When using the MIDAS software
use the .tenv files linked above)

Nearest 4 Other Stations Distance


7.45 km


32.18 km


36.25 km


47.84 km

Time Series Plots

Click on the buttons on the left below to choose from available reference frames, latencies, and sample rates. Original, Cleaned (outlier removed) and detrended (using MIDAS rate) plots are available. See plot explanation page for further explanations on plot contents.

GPS time series plot
GPS time series plot
GPS time series plot
GPS time series plot
GPS time series plot
QA plot
Load prediction plot

Steps Information for this station

Station ID Date
Equipment Change Type/
or Event ID
LTAC14MAR16 usc000ndnj 6.7 219.2
LTAC14MAR17 usc000ndw9 6.4 227.7
LTAC14MAR22 usc000nl0m 6.2 200.4
LTAC14MAR23 usc000nm96 6.3 192.1
LTAC14APR01 usc000nzvd 8.2 180.9
LTAC14APR01 usc000nzwm 6.9 216.5
LTAC14APR03 usc000p26f 6.5 253.3
LTAC14APR03 usc000p27i 7.7 281.1
LTAC15MAR23 us10001ppx 6.4 122.1
LTAC15SEP16 us20003k7a 8.3 1510.2
LTAC17OCT10 us2000b3dm 6.3 80.1
LTAC18JAN14 us2000cjfy 7.1 535.5
LTAC18JAN21 us2000cm0f 6.3 127.4
LTAC19MAR01 us1000j96d 7.0 371.4
LTAC19MAY26 us60003sc0 8.0 1464.8
Distance is from this station to earthquake epicenter in km. A potential step record appears when this distance is less than 10^(M/2 - 0.79) where M is earthquake magnitude.
Steps for all stations are given in the master step file database.

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