GOES-R and SOHO/EPHIN Real-time Dataset
To address the problems within the lower energy GOES differential proton channels, new custom channels that match the GOES differential energy channels below 51 MeV with data from SOHO/EPHIN were created. This has been achieved by following the method described in Kühl and Heber [2019] with the additional implementation of an improved electronic dead-time correction. In total six new energy bins were calculated for the period from 1996 onward with a time resolution of 5 minutes. Three channels matching the current GOES generation (GOES-R) and three matching the previous generations (GOES-N). The exact ranges are shown in the table. The GOES-R equivalent channels are also calculated in near real time and shown on this page with the direct comparison with GOES data. The EPHIN data allows us to achieve much lower proton flux background levels and less instrumental crosstalk (contamination) thanks to the active anti-coincidence of the instrument. The historical data can be found here.
| EPHIN | GOES-N | EPHIN | GOES-R |
|---|---|---|---|
| 4.2–7.8 MeV | 8, 10, 11: 4.0–9.0 MeV 13, 14, 15: 4.2–8.7 MeV |
7.8–12 MeV | 16, 18: 5.84–11.0 MeV |
| 8.7–15.0 MeV | 8, 10, 11: 9.0–15.0 MeV 13, 14, 15: 8.7–14.5 MeV |
12.0–25.0 MeV | 16, 18: 11.64–23.27 MeV |
| 15.0–44.0 MeV | 8, 10, 11: 15.0–44.0 MeV 13, 14, 15: 15.0–40.0 MeV |
25.0–40.0 MeV | 16: 24.9–38.1 MeV 18: 25.5–38.4 MeV |
Kühl, P., & Heber, B. (2019). Revising more than 20 years of EPHIN ion flux data—A new data product for space weather applications. Space Weather, 17(1), 84–98. https://doi.org/10.1029/2018SW002114
The real-time plot provides proton flux measurements from GOES-R and EPHIN across three different energy channels. The top panel shows the high-energy range, with GOES-R in red measuring 25.90–38.10 MeV and EPHIN in blue measuring 25.00–40.00 MeV. The middle panel shows the medium-energy range, with GOES-R covering 11.64–23.27 MeV and EPHIN covering 12.00–25.00 MeV. The bottom panel shows the low-energy range, with GOES-R measuring 5.84–11.00 MeV and EPHIN measuring 7.80–12.00 MeV. Proton flux is plotted on a logarithmic scale, allowing direct comparison of intensity levels and short-term variability between the two instruments.
Historical Data:
Historical data for both the real-time and historical datasets are available through the Data Retrieval Tool.
ACKNOWLEDGEMENTS
This project has received funding from the National Aeronautics and Space Administration under grant agreement No. P000127360 (National Observatory of Athens) and No. P000127494 (Christian-Albrechts-Universität)
