METAR Information for RJAI in Ichikawa , Japan (site inactive)

The following information is known about RJAI. If you think that any information is incorrect, then please follow the instructions for correcting that data item.

It is possible that this page will report a problem where no problem exists. If you believe that this has happened, then please contact me (address at the bottom of this page) and explain clearly why you think this page is in error. Note that any changes that you make may take a few days to show up here, so please give it a week before commenting.

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Registered Location

Latitude: 35° 44' 0" N (deg min sec), 35.7333° (decimal), 3544.00N (LORAN)
Longitude: 139° 55' 0" E (deg min sec), 139.9167° (decimal), 13955.00E (LORAN)
Elevation: 31 metres (102 feet)
Location: Ichikawa , Japan

The elevation does not correspond with the estimated elevation (6 metres (19 feet) -- source Google) at that point. It seems probable that the elevation was entered as feet rather than as metres. Please use the 'send the updated information' link below to update the location or elevation.

The site coordinates appear to be of low precision, and the station may be anywhere within the marked area. Clicking within the map area (or you can drag the 'RJAI' marker) will display the latitude/longitude of that point.

If the displayed location (or elevation) of the weather observing location is incorrect, please drag the marker to the right location (or click in the right location), and then send the updated information. Please note that we are trying to spot either the Stevenson Screen (or equivalent) or the location where the barometric readings are taken.

The best way to get elevation is to consult a topographic map. Make sure that you know whether the contours are marked in feet or metres. Note that handheld GPS receivers do not provide readings of elevation accurate to better than 10-20 metres (technical discussion). If you do not have access to a topographic map, then a GPS receiver is acceptable, but make sure that it is operating in 3D mode and let it average the position for at least five minutes.

For more information on reading maps, please see the Topo Map Reading Guide -- in particular it discusses how to read contours.

The location information for this site was gathered from 6 data sources. The possible locations for this site are up to 11.6 miles away. This makes it possible that the location chosen is incorrect. The source which most closely matches the consensus is chosen. Many of these sources only report the location to the nearest minute (or hundredth of degree). This can lead to the marker being placed noticeably incorrectly. Please see Discussion of Location Errors for more information. Show location history.

There are no photographs of the station. If you have pictures of this location, then please email them to

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs.

Neighboring Stations

This is a list of stations that are close to this station.

You can also subscribe to an RSS feed to tell you when new stations come online in this area. Choose either within 100 miles or 250 miles .

JH4XSY-1310.0 milesNorthwest Soka City, JP (lat 35.8445°, long 139.8017°, altitude 12 metres) (data present)
FW725424.1 milesSouthwest Yokohama, JP (lat 35.5700°, long 139.5388°, altitude 70 metres) (data present)
CW844328.9 milesWest Tokyo, JP (lat 35.7367°, long 139.4012°, altitude 110 metres) (data present)
GW254031.4 milesWest Hachioji (lat 35.7010°, long 139.3585°, altitude 139 metres) (data present)
EW878436.0 milesSouthwest Zushi Kanagawa, JP (lat 35.2972°, long 139.5688°, altitude 5 metres) (data present)
DW205788.8 milesNorthwest Karuizawa, JP (lat 36.3469°, long 138.5214°, altitude 1018 metres) (data present)
JA0BES-13115.6 milesNorthwest Nagano Prefecture, JP (lat 36.6702°, long 138.2022°, altitude 397 metres) (data present)
JE7ZDC137.7 milesNorth Matsukawa, JP (lat 37.6698°, long 140.4922°, altitude 210 metres) (data present)
JF7ELG-13138.1 milesNortheast Kasuuchi, JP (lat 37.5450°, long 140.9635°, altitude 29 metres) (data present)
JP7FSO145.4 milesNorth Minamiyanome, JP (lat 37.7917°, long 140.4533°, altitude 61 metres) (data present)

The sites marked above thus did not report continuously during the analysis period, so the offsets may (probably will) not be accurate.

Location Formats

The location is shown in three different formats. Each of these is used in some software, and is shown on some websites.

Degrees Minutes Seconds: VWS/VWSAPRS, WeatherLink 5.5, WeatherLink (5.2-5.4), WeatherView (Linux)

Decimal degrees: FreeWX, WeatherView32 (PC application)

LORAN: WeatherDisplay, WUHU, Henriksen WServer


CWOP Home: This describes the whole CWOP program and has a large amount of useful information.

CWOP Siting Guide (PDF): This is a guide to siting and operating a CWOP station. This is a must-read document.

Another CWOP Guide (PDF): This is another guide to siting and operating a CWOP station. This is a must-read document.

Urban Siting and Operations (PDF): This is a guide to siting and operating a CWOP station in an urban environment.

APRS WX Message format: This describes the actual format of the messages transmitted that carry WX information.

WXQC Mailing List: This is a mailing list where data quality issues are discussed. Assistance with software configuration can often be found here.

Topo Map Reading Guide: How to read USGS topographic maps, with a good section on reading contours.

Geographically nearby web pages: Use Geourl to find web pages that deal with locations geographically close to this site.

Overall website comments, problems etc to Philip Gladstone
Page layout last modified Sunday, 28 February 2016
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