Digital Ionograms [by Ionospheric Sounding Data Network(IONET)]
Table of Contents
Overview
Digital Ionograms are regularly obtained at the following stations under
the Communications Research Laboratory(CRL), Ministry of Posts and Telecommunications
of Japan.
Ionospheric observations are carried out at the above four stations in Japan
by means of vertical sounding using ionosondes. The ionosonde produces ionograms,
which are recorded digitally on computer storage medium. The digitally
recorded ionograms are collected from each station with the Ionospheric Sounding
Data Network(IONET).
Description of Dataset Files
You can take the digital ionograms for the past 7 days. Directory
name 'YYYYMMDD' means year:YYYY, month:MM, and day:DD. One directory included
all station's ionograms at intervals of 15 minutes. File name 'hhmms.gif'
means hour:hh, minute:mm, and initial of station name. All files are written
by 'GIF' format.
Examples :
Anonymous FTP Access
The table of contents above lists the files which are available through
anonymous FTP from the Communications Research Laboratory.
To access anonymous FTP at CRL use the following
information...
Machine Address : kok_2nd_process.crl.go.jp
Login Name : anonymous
Password : <your email address> (ex.gachyon@crl.go.jp)
Click here to
download the dataset.
Downloading files with Mosaic
The following steps should facilitate downloading files with Mosaic...
- Select Load To Local Disk from the Options menu.
- Select any of the following items which you would like to download. You will
be prompted to name the file to be saved on your local disk after each item that
you select.
- Select Load To Local Disk from the Options menu again to turn this option off.
This will return Mosaic to it's default mode of operation.
Questions and Comments
Send questions or comments to ...
Kiyoshi Igarashi igarashi@crl.go.jp
Hiraiso/CRL Home Page