INAG - Ionosonde Network Advisory Group

INAG - Ionosonde Network Advisory Group Home page

INAG is Working Group 1 of URSI Commission G and is responsible for:

  • collecting together information on the analysis of ionograms,
  • maintaining conventions for the reduction of ionograms,
  • providing a forum for people interested in obtaining reliable data from ionograms,
  • preserving the Global ionospheric climate record.

The INAG Bulletin is one of the more important outputs of INAG. This Web site has become an extension of the Bulletin. In addition, there are a number of other useful reference publications that are reproduced here for wider distribution.


INAG Bulletin Archive
INAG-73 Web Bulletin 2012

UAG-23A: URSI Handbook of Ionogram Interpretation and Reduction
UAG-50: High Latitude Supplement to the URSI Handbook of Ionogram Interpretation and Reduction
Summary of URSI-STP Meeting on the Vertical Soundings Network (1969) (2.4 MB)

UAG-93: Ionogram Analysis with the Generalised Program POLAN
UAG-104: Ionosondes and Ionosonde Networks (1993)

Software for handling digital ionograms from an IPS-42 ionosonde

Australian Ionogram Scaling Training Material (2007 version) (~1.2 MB)
Australian (IPS) Manual Ionogram Scaling Conventions (1996) (~480 kB)

Japanese Scaling Manual Version 3 (1987) (4.4 MB)

Comments or suggestions can be directed to

Phil Wilkinson
Editor, INAG