What is the minimum altitude for glide slope interception during the ILS RWY 13 procedure at DSM?

The minimum altitude for glide slope interception during the Instrument Landing System (ILS) approach to Runway 13 in DSM is specified to ensure safe and stable descent onto the glide slope. Intercepting the glide slope at the correct altitude allows the aircraft to efficiently transition from the en-route phase of flight to the final descent phase, providing the necessary vertical guidance to align with the runway.

In this case, the altitude of 2,600 feet MSL is established as the minimum because it aligns with the standard operational procedures that account for terrain and obstacle clearance. This altitude ensures that pilots can safely intercept the glide slope while avoiding potential hazards in the area surrounding the approach path.

The other altitudes provided do not meet the established criteria for a safe glide slope interception or may be associated with different stages of the approach rather than the ILS glide slope interception point.