# PURPOSE: This file distributes the Hp30 index and ap30 index of the geomagnetic Hpo index family
# LICENSE: CC BY 4.0
# SOURCE: Geomagnetic Observatory Niemegk, GFZ German Research Centre for Geosciences, please cite:
# Yamazaki, Y., Matzka, J., Stolle, C., Kervalishvili, G., Rauberg, J., Bronkalla, O., Morschhauser, A., Bruinsma, S., Shprits, Y.Y., Jackson,
# D.R., 2022. Geomagnetic Activity Index Hpo. Geophysical Research Letters, 49, e2022GL098860, https://doi.org/10.1029/2022GL098860
#
# Hp30 and ap30
# Hp30 and ap30 are produced by Geomagnetic Observatory Niemegk, GFZ German Research Centre for Geosciences. Both indices are unitless.
# Described in: Yamazaki et al. (2022), see reference above.
# Data publication: Matzka, J., Bronkalla, O., Kervalishvili, G., Rauberg, J. and Yamazaki, Y., 2022. Geomagnetic Hpo index. V. 2.0. GFZ Data
# Services, https://doi.org/10.5880/Hpo.0002
#
# Short file description (for a detailed file description, see Hpo_format.txt):
# 30 header lines, all starting with #
# ASCII, blank separated and fixed length, missing data indicated by -1.000 for Hp30 and -1 for ap30
# YYYY MM DD is date of UT day, hh.h is starting time in hours of interval for which Hp30 and ap30 are given
# hh._m is mid time in hours of interval for which Hp30 and ap30 are given
# days is days since 1932-01-01 00:00 UT to start of interval, days_m is days since 1932-01-01 00:00 UT to mid of interval
# Hp30, ap30
# Currently always D = 0, reserved for future use.
#
#
#
#
#
# The format for each line is (i stands for integer, f for float):
#iii ii ii ff.f ff.ff fffff.fffff fffff.fffff ff.fff iiii i
#
# The parameters in each line are:
#YYY MM DD hh.h hh._m        days      days_m   Hp30 ap30 D