When bears attack, NOAA satellites have your back

Personal locator beacon proves essential to teen hikers

A grizzly bear takes a fall stroll in Alaska’s Gate of the Arctic National Park and Preserve.

A grizzly bear takes a fall stroll in Alaska’s Gate of the Arctic National Park and Preserve.

(Credit: National Parks Service.)


A NOAA geostationary satellite played a pivotal role in the July 23 rescue of a group of student hikers from a vicious grizzly bear attack in Alaska, helping direct first responders to the scene. The teenagers were hiking through the Alaska wilderness and crossing a creek about 93 miles north of Anchorage when the bear attacked. Of the four teens injured by the attack, two required hospitalization.

Other members of the hiking troop activated an emergency personal locator beacon. NOAA’s GOES-11 spacecraft first picked up the beacon’s distress signal, and a European polar-orbiting satellite, flying closer to Earth, pinpointed the actual location of the hikers. The information was relayed to the Alaska Rescue Coordination Center, which alerted Alaska State Troopers and the Alaska Air National Guard who rescued the teens.

SARSAT image.

NOAA satellites are a part of an international satellite-aided search and rescue system known as SARSAT that helps first responders locate people in distress by detecting signals from hand-held personal locator beacons or from emergency beacons mounted onboard boats and aircraft.

Download here. (Credit: NOAA SARSAT.)

NOAA’s polar-orbiting and geostationary satellites, along with Russia’s COSPAS spacecraft, are part of the international Search and Rescue Satellite Aided Tracking system called COSPAS-SARSAT. The system uses a global network of satellites to quickly detect and locate distress signals from emergency beacons onboard aircraft and boats, and from smaller, handheld personal locator beacons, called PLBs.

“A major tragedy was averted because COSPAS-SARSAT and the satellites and first responders that make the system work were in place,” said Chris O’Connors, program manager for NOAA SARSAT.

When a NOAA satellite finds the location of a distress signal within the United States or its surrounding waters, it relays the information to the SARSAT Mission Control Center based at NOAA’s Satellite Operations Facility in Suitland, Md. From there, the information is quickly sent to a rescue coordination center operated by either the U.S. Air Force (for land rescues) or the U.S. Coast Guard (for water rescues).

NOAA’s GOES 11 satellite.

NOAA’s GOES 11 satellite helped pinpoint the location of a group of teen hikers in need of emergency medical attention after they were attacked by a bear in the Alaska wilderness.

Download here. (Credit: NOAA.)

Now in its 29th year, COSPAS-SARSAT has been credited with supporting more than 28,000 rescues worldwide, including more than 6,630 in the United States and its surrounding waters.

Emergency beacons are the cornerstone of this lifesaving system, but must be registered to ensure responders have all the critical information they need to mount a successful rescue effort.

“Registration helps us provide better, faster assistance to people in potentially life-threatening situations,” said O’Connors. “The registration information also may tell us more about the location of the emergency, how many people need assistance, what type of help may be needed and other ways to contact the owner.”

By law, emergency beacon owners must register the units with NOAA, which they can easily do online by visiting http://www.beaconregistration.noaa.gov.

To learn more about search and rescue satellite-aided tracking, visit www.sarsat.noaa.gov.

Posted July 28, 2011 NOAA logo.