A United Launch Alliance (ULA) Delta IV Heavy rocket carrying the NROL-68 mission for the National Reconnaissance Office (NRO) lifted off on June 22 at 5:18 a.m. EDT from Space Launch Complex-37 at Cape Canaveral Space Force Station. 

Launch Date: June 22, 2023

Launch Time: 5:18 a.m. EDT (0918 UTC)

GO Delta IV Heavy! GO NROL-68!


Launch Webcast

Live updates

To keep up to speed with updates to the launch countdown, dial the ULA launch hotline at 1-877-852-4321.

Join the conversation at Twitter, Facebook, Instagram and LinkedIn

#DeltaIVHeavy #NROL68

Mission Overview

A United Launch Alliance (ULA) Delta IV Heavy rocket is launching the NROL-68 mission for the National Reconnaissance Office (NRO). Liftoff will occur from Space Launch Complex-37 at Cape Canaveral Space Force Station, Florida.

When the United States needs eyes and ears in critical places where no human can reach – be it over the most rugged terrain or through the most hostile territory – it turns to the NRO. The NRO is the Intelligence Community agency responsible for developing, acquiring, launching and operating America’s reconnais­sance satellites, as well as operating associ­ated data processing facilities in support of national security.

The NRO uses a variety of satellites to meet mission needs—from small sats to more tradi­tional, larger satellites. This allows the NRO to pursue a hybrid architecture designed to pro­vide global coverage against a wide range of intelligence requirements, carry out research and development efforts, and assist emergen­cy and disaster relief efforts in the U.S. and around the world. The NRO never loses focus on who they are working to protect: our nation and its citizens.

Launch Vehicle

Payload Fairing

The payload fairing (PLF) is a metallic trisector (three-piece shell), 5-meter diameter fairing. The PLF encapsulates the spacecraft to protect it from the launch environment on ascent. The vehicle’s height, with the 65-ft (19.8-m) long PLF, is approximately 235 ft (71.6 m).


Delta Cryogenic Second Stage (DCSS) 

The Delta Cryogenic Second Stage is a cryogenic liquid hydrogen/liquid oxygen-fueled vehicle, powered by a single RL10C-2-1 engine that produces 24,750 lbs (110.1 kilo-Newtons) of thrust. The DCSS propellant tanks are structurally rigid and constructed of formed aluminum plate, spun-formed aluminum domes and aluminum ring forgings. The tanks are insulated with a spray-on insulation and helium-purged insulation blankets. An equipment shelf attached to the aft dome of the DCSS liquid oxygen tank provides the structural mountings for
vehicle electronics.


The three Delta IV Heavy common booster core (CBC) tanks are structurally rigid and constructed of isogrid aluminum barrels, spun-formed aluminum domes and machined aluminum tank skirts. Delta IV booster propulsion is provided by the throttleable RS-68A engine system which burns cryogenic liquid hydrogen and liquid oxygen, with each of the three booster engines delivering 705,250 lbs (312.3 kilo-Newtons) of thrust at sea level. The booster’s cryogenic tanks are insulated with a combination of spray-on and bond-on insulation and helium-purged insulation blankets. The booster is controlled by the DCSS avionics system, which provides guidance, flight control.

Flight Profile


Space Launch Complex-37 // Processing

Space Launch Complex-37, the East Coast home of the Delta IV Heavy rocket at Cape Canaveral Space Force Station in Florida, is a classic launch pad design with a Fixed Umbilical Tower (FUT) and a Mobile Service Tower (MST). The core stages of the rocket are assembled in the nearby Horizontal Integration Facility, then rolled to the pad for attachment of the payload, final testing and the countdown. The mobile gantry is retracted to unveil the rocket several hours before liftoff.

1. Delta Operations Center (DOC)
    Mission Director’s Center & Second Stage Processing
2. Horizontal Integration Facility (HIF)
    Receiving, Inspection & Vehicle Integration
3. Spaceflight Processing Facility
    Spacecraft Processing,
    Testing & Encapsulation
4. Mobile Service Tower

    Launch Vehicle Integration &   
    Testing, Spacecraft Mate &
    Integrated Operations


1. Canoga Park, CA
    RS-68A Engine Fabrication    
    at Aerojet Rocketdyne 

2. Denver, CO

    ULA Headquarters & 
     Design Center Engineering
3. Decatur, AL
    Booster, Payload Fairing and
    Second Stage Fabrication 
4. West Palm Beach, FL
    RL10C-2-1 Engine Fabrication at 
    Aerojet Rocketdyne

Media // Downloads