NASA OCO-2 Satellite Takes First Look at Earth's Carbon Dioxide

Artist's rendition of NASA's OCO-2 satellite in orbit. 

OCO-2 was launched on July 2, 2014 and made its first science measurements a month later, on Aug. 6. 

Credit: JPL/NASA

NASA's newest satellite has arrived in its final orbit and begun tracking levels of the heat-trapping gas carbon dioxide in Earth's atmosphere.

The Orbiting Carbon Observatory 2 (OCO-2), which blasted off July 2, arrived in its final orbit 438 miles (705 kilometers) above the Earth on Aug. 3.

The satellite then collected its first test data three days later while flying over Papua New Guinea, agency officials said.

"The initial data from OCO-2 appear exactly as expected, the spectral lines are well resolved, sharp and deep," OCO-2's chief architect and calibration lead, Randy Pollock, of NASA's Jet Propulsion Laboratory in Pasadena, California, said in a statement Monday (Aug. 11).

"We still have a lot of work to do to go from having a working instrument to having a well-calibrated and scientifically useful instrument, but this was an important milestone on this journey."



OCO-2 is the first operational NASA satellite dedicated to measuring atmospheric levels of carbon dioxide, which scientists say is largely responsible for Earth's recent warming trend.

Concentrations of the gas in Earth's air have risen from 280 parts per million (ppm) before the Industrial Revolution to about 400 ppm today, primarily due to the burning of fossil fuels and other human activities.

OCO-2 will use its single scientific instrument, a grading spectrometer, to gather precise CO2 data thousands of times each day, helping researchers get a much clearer picture of how the gas is cycling through the atmosphere, what sources are pumping it out, and which "sinks" are sucking it up, NASA officials said.

OCO-2 will become the leader of the Afternoon Constellation, or A-Train, as shown in this artist's concept. 

Japan’s Global Change Observation Mission - Water (GCOM-W1) satellite and NASA’s Aqua, CALIPSO, CloudSat and Aura satellites follow. 

Image Credit: NASA

By reaching its ultimate, near-polar orbit, OCO-2 joined five other Earth-observation satellites in a constellation known as the "A-Train." (The name is short for "Afternoon Train"; all of the spacecraft cross the equator going north in the early afternoon local time.)

The OCO-2 mission team will calibrate the spacecraft's spectrometer over the next few weeks.

The satellite will also beam to Earth up to 1 million scientific measurements every day, to help test out data-processing systems on the ground, NASA officials said.

The $465 million mission should start delivering calibrated science data before the end of 2014, they added.

ULA Delta II rocket Launch: OCO-2 Heads to Orbit

A United Launch Alliance Delta II rocket launches with the Orbiting Carbon Observatory-2 (OCO-2) satellite onboard from Space Launch Complex 2 at Vandenberg Air Force Base, California.

OCO-2 will measure the global distribution of carbon dioxide, the leading human-produced greenhouse gas driving changes in Earth’s climate.

Image Credit: NASA/Bill Ingalls

NASA OCO-2 satellite to track carbon pollution - launch delayed

The United Launch Alliance Delta II rocket with the Orbiting Carbon Observatory-2 (OCO-2) satellite onboard, is seen moments after the launch gantry was moved at the Space Launch Complex 2, Monday, June 30, 2014, Vandenberg Air Force Base, California

A water flow problem on Tuesday forced the US space agency to postpone the launch of a satellite to track atmospheric carbon dioxide, a leading greenhouse gas.

The Orbiting Carbon Observatory-2 was due to take off atop a Delta 2 rocket at 2:56 am Pacific time (0956 GMT) from Vandenberg Air Force Base in California but the operation was halted 46 seconds before scheduled liftoff time due to an issue with water flow to the rocket, NASA said.

The launch window on Tuesday was quite short, just 30 seconds.

The timing had to be precise so that the satellite could join the A-Train, a constellation of five other international Earth-observing satellites.

More details on the nature of the problem and a time for the next launch attempt were expected later Tuesday, NASA commentator George Diller said.

NASA's previous attempts to launch carbon satellites failed in 2009 and 2011.

NASA's OCO-2 Satellite on the Launch Pad

The launch gantry surrounding the Delta II rocket with the second Orbiting Carbon Observatory satellite onboard is seen in this black and white infrared view of Space Launch Complex 2 at Vandenberg Air Force Base, Calif.

The satellite will measure the global distribution of carbon dioxide, the leading human-produced greenhouse gas driving changes in Earth’s climate. 

OCO-2 is set for a July 1, 2014,launch.

Photo Credit: NASA/Bill Ingalls