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Helio calculates the latitude/longitude and area of sunspots. The only inputs are the data/time, the sunspot x and y coordinates and sunspot size.
Features:
Determine the solar position (RA, Dec, altitude and azimuth) and solar parameters (Bo, Lo, P, apparent diameter and Carrington rotation of the central meridian) for a given date and time, and observer latitude and longitude.
Select the orientation of the solar disk.
Display the central meridian, solar equator, latitude lines and longitude lines.
Input or select the position of a sunspot directly on the solar disk.
Calculate the sunspot latitude and longitude.
Input the sunspot size and calculate the sunspot area (in millionths of a solar hemisphere).
Display the Carrington Rotation number at the location of the sunspot.
Track a sunspot across the disk and from one rotation to the next (or previous) using either Carrington or differential rotation rates.
Produce a log file for sunspot measurements
On-line help.
Author(s): Peter Meadows (peter@petermeadows.com) Version: 3.2 Filesize: 883.50 Kb Language(s): English License type: Freeware
