Likely answer edit

IKONOS orbit — the four numbers to memorize.

Parameter Value
Altitude 681 km (423 mi)
Orbital period 98 min → 14.6 revolutions/day
Inclination 98.1° (sun-synchronous, near-polar)
Swath width 11 km at nadir
Scanner type Pushbroom (linear array)
  • “98.1°” is a near-polar sun-synchronous orbit — crosses the equator at the same local time (~10:30 AM descending) each day.