Kremer — Space UpClose — 20
Jan 2018
before the shutdown of the U.S. government due to a budget impasse between the
political parties in the national capitol, a United Launch Alliance (ULA) Atlas V rocket blasted off at dinnertime Friday night,
Jan. 19 and successfully delivered the SBIRS Geo Flight 4 infrared surveillance and enemy ballistic missile detection satellite to orbit for the U.S. Air
Force from Florida’s spaceport.
was “responding to commands” soon thereafter confirming its healthy on orbit operation.
of the launch window Jan. 19 at 7:48 p.m. EST, from seaside Space Launch Complex-41 on Cape
Canaveral Air Force Station in Florida by rocket provider United Launch Alliance (ULA).
and videos from myself and space colleagues and friends.
Flocks of excited spectators from across the globe gathered at
beaches and lined causeways ringing the Florida Space Coast for the especially
convenient dinnertime blastoff as the 19-story tall Atlas V roared off pad 41
into crystal clear, cloudless and comfortably warm evening skies.
as the first and second stages separated as the rocket and payload arced over
to the African continent and accelerated to orbit.
stationed at multiple angles:
Defense Satellite / Jan 19, 2018. Views from our remote cameras capturing
up-close angles of a ULA Atlas-V rocket, flying a rare ‘411’ configuration with
1 solid rocket booster, to deliver America’s fourth critical SBIRS missile
defense satellite (GEO-4) to orbit for the U.S Air Force on Jan 19, 2018.
Credit: Jeff Seibert
SBIRS GEO Flight-4 is the reward for years of hard work put in by our combined
government and industry team,” said Col. Dennis Bythewood, director of the
Remote Sensing Directorate, in a statement.
satellite on-orbit is the capstone event for the original SBIRS baseline
constellation, and I’m proud of everyone involved. Without their
perseverance and dedication to the mission, this wouldn’t have been possible.”
![]() |
Launch of the ULA Atlas V carrying the USAF SBIRS GEO Flight 4
mission on Jan. 19, 2018. Credit: Julian Leek |
expected.”
defense, battlespace awareness, and tactical intelligence critical to the defense of our homeland and our allies.
is the nation’s 24-7 global watchman, with infrared eyes ready to detect and
deliver early warning and tracking of ballistic missiles. A cornerstone of the
nation’s missile defense system, SBIRS is proving even more precise and
powerful than expected,” said Tom McCormick, vice president of Lockheed Martin’s Overhead Persistent Infrared
systems mission area.
Infrared System (SBIRS) is “considered to be one of the
nation’s highest priority space programs, and is designed to provide global,
persistent, infrared surveillance capabilities to meet 21st century demands.”
![]() |
Launch of the ULA Atlas V carrying the USAF SBIRS GEO Flight 4
mission on Jan. 19, 2018. Credit: Dawn Leek Taylor |
16.88 degrees. It separated from the 2nd stage 42 minutes and 31
seconds after liftoff as planned.
maneuvers to propel it to a geosynchronous earth orbit. Once in its final
orbit, engineers will deploy the satellite’s solar arrays and antennas. The
engineers will then complete checkout and tests in preparation for operational
use,” said the USAF.
System (SBIRS) Geosynchronous
Earth Orbit (GEO) Flight 4 satellite is designed to detect infrared signatures that
will
deliver vital early warnings on incoming hostile nuclear and conventional ballistic missiles in case of an enemy attack
on the US and its allies.
highlighted just days ago by the false missile attack alert alarm sent out by Hawaiian state authorities
with the Emergency
Management Agency (EMA) warning of an
imminent ballistic missile attack of the type that this satellite would detect.
The false alarm panicked hordes of residents and tourists alike and took 38
minutes to correct.
Korean dictator Kim John Un repeatedly launching ever more powerful and
upgraded long range intercontinental ballistic missiles this past year that
could potentially strike virtually the entire United States land mass, SBIRS
GEO 4 is more important than ever for our national defense.
![]() |
The ULA Atlas V rocket launched the U.S.
Air Force SBIRS GEO Flight 4 mission on Jan. 19, 2018 from Space Launch Complex-41 on Cape Canaveral Air Force Station, Fla., and successfully delivered the infrared missile tracking satellite to orbit. Credit: Ken Kremer/SpaceUpClose.com |
fourth in the SBIRS constellation. It marked the completion of the initial
network of a quartet of infrared surveillance
satellites that will provide rapid and accurate warning of attacking enemy
strategic missiles via infrared signatures – as well as critical targeting data
to US missile defense systems to enable swiftly responding launches that will
hopefully destroy the attackers in the battle space arena before impacting and
destroying US cities, infrastructure and military installations and killing
untold millions.
of GEO Flight-4 will mark the fulfillment of the original SBIRS baseline
constellation and reaffirm our commitment to provide our country, warfighters,
and senior leaders with timely, reliable, and accurate missile warning and
infrared surveillance information,” said Lt. Gen. John Thompson, SMC commander
and Air Force program executive officer for space.
![]() |
The ULA Atlas V rocket launched the U.S.
Air Force SBIRS GEO Flight 4 mission on Jan. 19, 2018 from Space Launch Complex-41 on Cape Canaveral Air Force Station, Fla., and successfully delivered the infrared missile tracking satellite to orbit. Credit: Ken Kremer/SpaceUpClose.com |
Based Infrared System (SBIRS) satellite was launched into geosynchronous
transfer orbit some 22,000 miles (36,000 kilometers) over the equator.
successful acquisition of signals from the satellite 37 minutes later.
is responding to the Wing’s commands as planned. Signal acquisition was
confirmed approximately 37 minutes after the satellite’s 7:48 p.m.
EST launch aboard a United Launch Alliance (ULA) Atlas,” reported satellite
builder Lockheed Martin.
the Air Force’s orbiting missile warning constellation equipped with powerful
scanning and staring infrared surveillance sensors.”
military to detect missile launches, support ballistic missile defense, expand
technical intelligence gathering and bolster situational awareness on the
battlefield. The satellite also completes the initial constellation and allows
SBIRS to provide global coverage.”
the preparations for the fourth launch of a SBIRS GEO satellite is a big deal,”
notes Col. Dennis Bythewood. “The entire
team understands how significant this is, and we’re ready to make it happen.”
Defense Support Program (DSP) constellation which has been in operation since
1970.
![]() |
A ULA Atlas V rocket
carrying the SBIRS GEO Flight 4 mission for the U.S. Air Force lifts off from Cape Canaveral Air Force Station’s Space Launch Complex-41 at 7:48 p.m. EST, Jan. 19, 2018. Credit: Ken Kremer/SpaceUpClose.com |
194-foot-tall commercial Atlas V booster launched in the 411 rocket
configuration with approximately 860,000 pounds of sea level first stage
thrust powered by the single engine dual
nozzle Russian-built RD AMROSS RD-180 engine fueled by liquid oxygen and RP-1
kerosene propellants. There is one thrust augmenting Aerojet-Rocketdyne
AJ-60A
solid rocket booster (SRB) attached to the first stage generating approximately 348,500 pounds of thrust.
pound satellite is housed inside a 4-meter (14 foot) diameter large payload
fairing (LPF). The Centaur upper stage
is powered by a single Aerojet Rocketdyne RL10C engine producing 22,900 lb of
thrust fueled by liquid oxygen and liquid hydrogen.
![]() |
A ULA Atlas V rocket
carrying the SBIRS GEO Flight 4 mission for the U.S. Air Force lifts off from Cape Canaveral Air Force Station’s Space Launch Complex-41 at 7:48 p.m. EST, Jan. 19, 2018. Credit: Ken Kremer/SpaceUpClose.com |
This mission marked the
5th Atlas V mission in the minimally used 411 configuration, including NASA’s
OSIRIS-REX asteroid sampling probe.
missions launched on the ULA Atlas V 401 workhouse configuration of the rocket.
was added for a controlled deorbit of the second stage.
due to an issue with a faulty ground hardware valve with the first stage
boosters liquid oxygen system.
GEO Flight 4 comes almost exactly 1 year after the SBIRS GEO 3 launch likewise on an Atlas V in January 2017.
satellite was launched in 2011 and the second in 2013.
Lockheed Martin’s satellite manufacturing facility in Sunnyvale, California.
under contract to build two more upgraded satellites in the SBIRS series based
on the LM 2100 satellite bus. SBIRS 5 and 6 will
launch after 2020.
already improving on SBIRS, upgrading our fifth and sixth SBIRS GEO satellites
to our modernized LM 2100 satellite
bus at no additional cost to the Air Force. On SBIRS 5 and 6 the Air
Force saved $1 billion through improved production and management efficiencies,”
noted Tom McCormick.
Atlas V launch stretching back to the company’s founding back in 2006 and the
Atlas V inaugural flight in 2002.
125 successful launches now under its belt.
Remote Sensing Systems Directorate at the U.S. Air Force Space and Missile
Systems Center. Lockheed Martin is the prime contractor, with Northrop Grumman
as the payload integrator. Air Force Space Command operates the SBIRS system.
and launch stories.
for Ken’s continuing onsite coverage of Falcon Heavy, ULA and NASA and space mission
reports direct from the Kennedy Space Center and Cape Canaveral Air Force
Station, Florida.
Earth and Planetary science and human spaceflight news: www.kenkremer.com – www.spaceupclose.com – twitter
@ken_kremer