Update index.yml

Author: meaghanlewis

articles/orbital/index.yml

@@ -73,7 +73,7 @@ landingContent:
             url: /azure/architecture/industries/aerospace/geospatial-processing-analytics 
           - text: Organize spaceborne geospatial data with STAC
             url: organize-stac-data.md
-          - text: SAR reference architecture
+          - text: Process Synthetic Aperture Radar (SAR) data
             url: sar-reference-architecture.md   
       - linkListType: tutorial
         links:
@@ -92,4 +92,4 @@ landingContent:
           - text: Contact profile
             url: concepts-contact-profile.md
           - text: Spacecraft object
-            url: spacecraft-object.md
+            url: spacecraft-object.md