Database for scaned daily plots of Toyokawa Radio Polarimeters

Photographs of time-series plots of solar radio waves (1, 2, 3.75, and 9.4 GHz) observed at the Nagoya University Aerospace Research Institute (Toyokawa City) from 1958 to 1978 has been stored in microfiche form. In order to avoid disappearring these data, we scaned the time-series plots in this microfiche and then publish them as a digital image database. These data are useful for estimating the scale, start time, microwave spectrum, and duration of solar flares that occurred before the 1980s, when solar X-ray monitoring observations have not been conducted by GOES.

Description about files contained in this database

YYYYMMDD_FREQ_R+L.tif: TIFF file for R+L daily plot
YYYYMMDD_FREQ_R-L.tif: TIFF file for R-L daily plot
Note: '1000', '2000', '3750', and '9400' for FREQ correspond to 1, 2, 3.75, and 9.4 GHz, respectively.

When you publish your work using this database, we strongly encourage to acknowledge the publisher as follows.

Example of acknowledgments

Database for scaned daily plot of Toyokawa Radio Polarimeters (doi: to be registered) was developed by the Center for Heliospheric Science, Institute for Space-Earth Environmental Research (ISEE), Nagoya University.

• 10.34515/DATA_TORP-00000

• Shimojo, M. and K. Iwai, Over seven decades of solar microwave data obtained with Toyokawa and Nobeyama Radio Polarimeters, Geoscience Data Journal, 10, 1, 114-129, 2023
  (doi: 10.1002/gdj3.165).
  
• Matsumoto, K., S. Masuda, M. Shimojo, and H. Hayakawa, Relationship of peak fluxes of solar radio bursts and X-ray class of solar flares: Application to early great solar flares, PASJ, 75, 6, 1095-1104, 2023
  (doi: 10.1093/pasj/psad058).