HMI Synoptic Maps Produced by NSO/NISP

TL;DR

This paper describes the production and processing of synoptic maps from HMI magnetograms by the NSO, covering data from 2010-2015, including the processing steps and map contents.

Contribution

It introduces a standardized pipeline for creating synoptic maps from HMI data, enabling consistent analysis of solar magnetic activity.

Findings

Produced synoptic maps for 2010-2015 using twice daily HMI images

Applied algorithms similar to SOLIS/VSM to generate magnetic and variance maps

Provided an overview of map contents and processing procedures

Abstract

Recently, the National Solar Observatory (NSO) Solar-atmosphere Pipeline Working Group has undertaken the production of synoptic maps from Helioseismic and Magnetic Imager (HMI) magnetograms. A set of maps has been processed spanning the data available for 2010-2015 using twice daily images (taken at UT midnight and noon) and running them through the same algorithms used to produce SOLIS/VSM 6302l mean-magnetic and spatial-variance maps. The contents of this document provide an overview of what these maps look like, and the processing steps used to generate them from the original HMI input data.