Northrop Grumman Delivers 21 Tranche 1 Transport Layer Satellites to Vandenberg

Northrop Grumman said it delivered 21 satellites to Vandenberg Space Force Base for Tranche 1 of the Space Development Agency's Transport Layer (T1TL). The layer will have 126 satellites — 42 each from Northrop Grumman, York Space Systems and Lockheed Martin — with the second launch expected in early October.

• T1TL comprises 126 satellites: 42 each from Northrop Grumman, York Space and Lockheed Martin
• The second T1TL launch is expected in early October
• All Tranche 1 satellites are to be in orbit within six to eight months
• The program is more than a year behind schedule due to optical terminal delays