This third survey (in the series of UFS Application Surveys) delves deeper into the metrics deemed to be most critical according to the responses of our prior survey. In this survey, we will be asking you about specific metrics for the fields and levels you have identified in previous surveys.   We will also ask about recommended regions over which the metrics should be verified and the sources of validation (i.e. "truth") for each field.    𝐈𝐟 𝐲𝐨𝐮 𝐟𝐞𝐞𝐥 𝐭𝐡𝐚𝐭 𝐲𝐨𝐮 𝐜𝐚𝐧𝐧𝐨𝐭 𝐚𝐧𝐬𝐰𝐞𝐫 𝐚 𝐩𝐚𝐫𝐭𝐢𝐜𝐮𝐥𝐚𝐫 𝐪𝐮𝐞𝐬𝐭𝐢𝐨𝐧, 𝐲𝐨𝐮 𝐦𝐚𝐲 𝐬𝐤𝐢𝐩 𝐢𝐭.

In the first two rounds of surveys, participants ranked the most critical fields for space weather forecasting as follows:

UPPER ATMOSPHERE fields included:
Total Electron Content (TEC)
Electron Density (F-Region)
Scintillation  (F-Region)
U/V Winds (80km, 250km)
Wavenumber (80km)

IONOSPHERIC INDICES were identified as:
f0F2
Aurora Electron Energy Flux
Aurora Boundary
Disturbance Storm Time Index (Dst)

SOLAR INDICES were identified as:
Symmetric horizontal component of geomagnetic field [SYM‐H]
Z Component of Interplanetary Magnetic Field [IMF‐Bz])
Solar wind particle/velocity [Vp]
F10.7 Solar Flux
Kp Index

CONSTITUENT FIELDS were:
O/N2 ratio (Column Integrated, F-Region)
O+  (F-Region)
O    (F-Region)

Full results of the first two surveys can be found on the Pre-Workshop Survey 1 and Survey 2 pages: https://dtcenter.org/events/2021/2021-dtc-ufs-evaluation-metrics-workshop/pre-workshop-survey-1.

This third survey will refine our initial prioritization from the first two surveys.  These topics will also be discussed at the Metrics Workshop (https://dtcenter.org/events/2021/2021-dtc-ufs-evaluation-metrics-workshop).

Thank you for your time and input into the UFS testing and evaluation process!