Fig. 10


a The data coverage of DMSP orbits in the northern hemisphere under different IMF conditions. For most of the bins, effective data point number is over 1000. b As similar as a but for the DMSP data coverage in the southern hemisphere.
a The data coverage of DMSP orbits in the northern hemisphere under different IMF conditions. For most of the bins, effective data point number is over 1000. b As similar as a but for the DMSP data coverage in the southern hemisphere.