|NATIONAL AERONAUTICS AND SPACE ADMINISTRATION|
The Space Environments Team in the Natural Environments Branch of the Engineering Directorate at Marshall Space Flight Center (MSFC)
provides solar cycle predictions for NASA engineering programs and the aerospace community.
The purpose of the predictions is to provide future statistical estimates of sunspot number, solar radio 10.7 cm flux (F10.7),
and the geomagnetic planetary index, Ap, for input to various space environment models.
For example, the F10.7 and Ap are required inputs to upper atmosphere (thermosphere) density computer models used for spacecraft
operations such as orbital lifetime analysis and for the planning of future spacecraft missions.
Solar Cycle Progression & Forecast
(Updated 4 Nov 2016)
Archived Predictions: Tabular Data
Sunspot Index and Long-term Solar Observations (SILSO) World Data Center (WDC), Royal Observatory of Belgium
Solar Radio Flux (10.7cm):
Solar Monitoring Program, Space Weather Canada
Ap Geomagnetic Index:
Indices of Geomagnetic Activity, Geophysics Department, GFZ Helmholtz Center Potsdam