High-latitude supplement to the URSI handbook on ionogram interpretation and reduction

"This Supplement to the Second Edition of the URSI Handbook of Ionogram Interpretation and Reduction [W.R. Piggot and K. Rawer, Report UAG-23, World Data Center A (WDC-A) for Solar-Terrestrial Physics, November 1972] is intended to provide reference samples of actual ionograms to illistrate the line drawings given in the Handbook, to provice reference inograms and ionogram sequences so as to aid future discussions and to clarify particular dofficulties. This collection should also be useful to scientists who need to use ionoshperic data but are not expert in the field of ionogram interpretation. Many of the phenomena will be found in the Atlas of ionograms [A. H. Shapley, Report UAG-10, WDC-A for Solar Terrestrial Physics, May 1970]"--Introduction. by W.R. Piggott. Supplement to the 2d edition of the URSI handbook of ionogram interpretation and reduction (World Data Center A for Solar-Terrestrial Physics. Report UAG-23). "October 1975." Also available online in PDF format. 1975 NESDIS (National Environmental Satellite, Data, and Information Service) Library Public Domain 2286