1.2 How to Access the Yohkoh Observing Logs and Event Logs

The Yohkoh observing log contains a wealth of information which is readily accessible for searches and quick comparisons between instruments. In the following example the format of the plots may not be exactly what you need, but it is important to realize how simple the PLOTY program was to write since the observing log data files already exist. There is a lot of potential in the observing logs which is not being tapped as of yet, but the following sections touch on a few capabilities which currently exist.

• 1.2.1 Displaying a Light Curve Set of all Instruments (PLOTY)
• 1.2.2 Performing Searches Using the Observing Log (XSEARCH_OBS)
• 1.2.3 Listing of the SXT Images and Heliocentric Locations
• 1.2.4 Light Curves from BCS, WBS and HXT
• 1.2.5 Creating a List of Yohkoh Events (PR_EVN)
• 1.2.6 Direct Reading of the Observing Log