SEA LEVEL STATION MONITORING FACILITY
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Station metadata
Code john
Country USA
Location Johnston_US
Status Operational
Added to the system 2008-06-19 13:14:00
Local Contact University of Hawaii Sea Level Center ( USA )
GLOSS core ID 109   [goto handbook]
Long-term MSL data
Latitude 16.739
Longitude -169.5233
Connection GTS message
GTS message type SXHW11
GTS station code 15D142A4
Transmit interval (min) 5
Transmit lag UTC (sec) 0
Ave. transmit delay (min) 2
Messages received (24h) 272
Messages expected (24h) 288
Sensor 1
Type of sensorprs (pressure)
Sampling rate (min)1
    GTS format
Units of measurem
First value5
Samples10
Reversed orderyes
    Performance statistics
Last data measured at2024-11-23 14:12:00
Last data received at2024-11-23 14:14:03
Measurements received in 24h1420
Measurements expected1440
Performance ratio99%
Sensor 2
Type of sensorrad (radar)
Sampling rate (min)1
    GTS format
Units of measurem
First value18
Samples10
Reversed orderyes
    Performance statistics
Last data measured at2024-11-23 14:12:00
Last data received at2024-11-23 14:14:03
Measurements received in 24h1420
Measurements expected1440
Performance ratio99%
Sensor 3
Type of sensorenc (float sensor with encoder)
Sampling rate (min)5
    GTS format
Units of measurem
First value31
Samples4
Reversed orderyes
    Performance statistics
Last data measured at2024-11-23 14:12:00
Last data received at2024-11-23 14:14:03
Measurements received in 24h288
Measurements expected288
Performance ratio100%
Sensor 4
Type of sensorsw1 (1st switch)
Sampling rate (min)60
    GTS format
Units of measuremin
First value38
Samples1
Reversed orderno
    Performance statistics
Last data measured at2024-11-23 14:12:00
Last data received at2024-11-23 14:14:03
Measurements received in 24h272
Measurements expected24
Performance ratio1133%
Sensor 5
Type of sensorsw2 (2nd switch)
Sampling rate (min)60
    GTS format
Units of measuremin
First value42
Samples1
Reversed orderno
    Performance statistics
Last data measured at2024-11-23 14:12:00
Last data received at2024-11-23 14:14:03
Measurements received in 24h272
Measurements expected24
Performance ratio1133%
Sensor 6
Type of sensorbat (battery)
Sampling rate (min)5
    GTS format
Units of measureV
First value46
Samples1
Reversed orderno
    Performance statistics
Last data measured at2024-11-23 14:12:00
Last data received at2024-11-23 14:14:03
Measurements received in 24h273
Measurements expected288
Performance ratio95%
Period SignalsData

12h
day
7 days
30 days
 prs (pressure)
rad (radar)
enc (float sensor with encoder)
Remove outliers
Remove spikes 		Relative levels = signal - median over selected period
Absolute levels = as received
Offset signals = relative levels + offset
Show switch data
Show battery voltage
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