Hi everyone!
After recent discussion on reading SpaceWeather files from Agi and Celestrak on this topic, I have decided to look into Orekit source code (especially, CssiSpaceWeatherDataLoader class) to grasp how SpaceWeather files are read by it. I have found the following block of code inside CssiSpaceWeatherDataLoader class
if (line.equals("BEGIN MONTHLY_FIT")) {
lastDailyPredictedDate = set.last().getDate();
}
that seems to be responsible for assigning non-null value to lastDailyPredictedDate field. When I run a program (source code below) that prints lastDailyPredictedDate field value
import org.orekit.data.DataContext;
import org.orekit.data.DataProvidersManager;
import org.orekit.data.DirectoryCrawler;
import org.orekit.models.earth.atmosphere.data.CssiSpaceWeatherDataLoader;
import org.orekit.time.TimeScalesFactory;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.text.ParseException;
public class Main {
public static void main(String[] args) throws IOException, ParseException {
final Path orekitDataPath = Path.of("C:\\path\\to\\orekit-data\\folder");
final File orekitDataFile = orekitDataPath.toFile();
final DataProvidersManager manager = DataContext.getDefault().getDataProvidersManager();
manager.addProvider(new DirectoryCrawler(orekitDataFile));
final Path spWeather = orekitDataPath.resolve("CSSI-Space-Weather-Data\\SpaceWeather-All-v1.2.txt");
final CssiSpaceWeatherDataLoader loader = new CssiSpaceWeatherDataLoader(TimeScalesFactory.getUTC());
loader.loadData(Files.newInputStream(spWeather), "SpaceWeather-All-v1.2.txt");
System.out.println(loader.getLastDailyPredictedDate());
}
}
I got this output:
2096-10-01T00:00:00.000Z
After looking into SpaceWeather-All-v1.2.txt I have found out that it has 4 data section (listed from the top to the bottom): OBSERVED, DAILY_PREDICTED, MONTHLY_PREDICTED, MONTHLY_FIT. The last date of MONTHLY_PREDICTED block is
2096 10 01.
So my question is - is it expected behavior or it is supposed to read last date from DAILY_PREDICTED data section?
I use Orekit 13.1.2, Java 21 and use orekit-data folder from Orekit community repo.
Sorry for bothering 
Have a nice day!
