private static async Task <(Dms ra, Dms dec)?> SolveOne(string filename)
        {
            var low        = 0.9;
            var high       = 1.1;
            var downsample = 4;
            var info       = new ProcessStartInfo(_bashLocation, BuildCommand(low, high, downsample, filename))
            {
                UseShellExecute        = false,
                RedirectStandardOutput = true,
            };
            var process = Process.Start(info);
            var output  = await process.StandardOutput.ReadToEndAsync();

            var matches = _regex.Match(output);

            if (matches.Success)
            {
                var one = matches.Groups[1].Value;
                var two = matches.Groups[2].Value;
                if (double.TryParse(one, out var oneValue) && double.TryParse(two, out var twoValue))
                {
                    return(Dms.FromDegrees(oneValue), Dms.FromDegrees(twoValue));
                }
            }
            return(null);
        }