ascendingNodeLongitude

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: ascendingNodeLongitude

Indicates the angular position, measured in longitude, of an orbiting body's ascending node where it crosses from south to north of a reference plane.