EGU23-10126, updated on 26 Feb 2023
https://doi.org/10.5194/egusphere-egu23-10126
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

GHOTI: GOES-R High-cadence Operational Total Irradiance

Steven Penton1, Martin Snow1,2, Stephane Beland1, Woodraska Don1, and Coddington Odele1
Steven Penton et al.
  • 1LASP, University of Colorado, Boulder, CO, USA (first.lastname@lasp.colorado.edu)
  • 2SANSA, Hermanus, SA (msnow@sansa.org.za)

The EXIS (Extreme ultraviolet and X-ray Irradiance Sensors) detectors on the GOES-R spacecraft (GOES-16, GOES-17 & GOES-18) use quad-diode Sun Positioning Sensors (SPS) to maintain precision pointing. The 4 Hz quad-diode signal is high-precision and we attempt to use this signal as a high-cadence proxy for Total Solar Irradiance (TSI) and use the MgII index + NRLSS2 models to predict high-cadence spectra. The quad-diode signal must be calibrated for spacecraft velocity (a 1AU correction), instrument temperature, and diode degradation with usage. In the 2nd year of this 3-year project, we report the progress of these calibrations and our efforts toward defining our TSI proxy and high-cadence spectral data products.

How to cite: Penton, S., Snow, M., Beland, S., Don, W., and Odele, C.: GHOTI: GOES-R High-cadence Operational Total Irradiance, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-10126, https://doi.org/10.5194/egusphere-egu23-10126, 2023.