NASA, Ben Smegelsky, Associated Press
In this Nov. 24, 2014 photo made available by NASA, workers conduct a light test on the solar arrays on NOAA's Deep Space Climate Observatory spacecraft (DSCOVR) in Titusville, Fla., near Kennedy Space Center. The spacecraft will observe Earth, but its primary objective will be to monitor outbursts from the sun that could disrupt communications and power back on Earth.

CAPE CANAVERAL, Fla. — The SpaceX company has called off Sunday's launch of a deep-space observatory.

The countdown was halted at the two-and-a-half-minute mark at Cape Canaveral, Florida, because of a problem with a rocket-tracking system. At the same time, SpaceX was dealing with a rocket issue.

SpaceX had been aiming for a launch and landing within minutes of each other. The next try could come as early as Monday.

The company's main objective is to launch the government's Deep Space Climate Observatory to monitor solar outbursts. The spacecraft is refashioned from the Earth-gazing satellite conceived in the late 1990s by then Vice President Al Gore. Gore was on hand for the launch attempt and said he was grateful to all those who kept his dream alive.

A secondary goal is to attempt a landing of the leftover booster on an ocean platform. Last month's effort failed.