Observation of a vortex ring in the solar atmosphere
Solar atmosphere vortex ring observation in H alpha light /2 December 1969/
Hagen, J. P.↗
Engineering topics
Hagen, J. P.
Publications and source records attributed to Hagen, J. P..
36 GHz travelling wave maser.
Traveling wave maser with 6 db amplification at 36 GHz, using Cr ion doped rutile as active material and superconducting magnet for DC magnetic field
Hagen, J. P.↗
Research aspects of the communication satellite program.
Communication satellite program research
RADIO TRANSMITTER↗
NEW HORIZONS FOR ASTRONOMY
New horizons which space research has revealed, and their international implications
SPACE SCIENCE↗
Radioastronomical Observations of the Moon and the Planets
Radioastronomical observations of moon and planets
MOON↗