public async Task UpdateAsync(string callSign)
{
//download file
var localPath = Path.Combine(Constants.BaseFilePath, "CurrentConditions", callSign);
var url = CurrentConditions.UrlTemplate.Replace("xxxx", callSign);
var result = await RssHelper.GetStreamAsync(url, localPath);
//parse file
var doc = RssHelper.GetXDocFromFile(localPath);
var currentConditions = GetCurrentConditionFromXDoc(doc);
//save to db
}
