article_snippet.sent: With all the ground-based and airborne resources that the different groups are bringing to the Four Corners region of the U.S. Southwest, we have the unique chance to unequivocally solve the Four Corners mystery,' said Christian Frankenberg, a scientist at NASA's Jet Propulsion Laboratory, Pasadena, California, who is heading NASA's part of the effort.
article_snippet.sent: Last fall, researchers including Frankenberg reported that the Four Corners.
article_snippet.sent: Research scientist Christian Frankenberg of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, first noticed the Four Corners signal years ago in (SCIAMACHY data. '
article_snippet.sent: Research scientist Christian Frankenberg of NASA's Jet Propulsion Laboratory (JPL) in Pasadena
article_snippet.sent: , California didn't focus on it because Research scientist Christian Frankenberg of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California weren't sure if it was a true signal or an instrument error,' Frankenberg said.