equinoctial

adj.

春分或秋分的，赤道的；

n.

春分或秋分时的暴风雨；

Saturn's equinoctial auroras
On the equinoctial orbit elements
Equinoctial transitions in the ionosphere and thermosphere
A set of modified equinoctial orbit elements
Equinoctial orbit elements - Application to artificial satellite orbits.
Equinoctial asymmetries in the ionosphere and thermosphere observed by the MU radar
Equinoctial and solstitial averages of magnetospheric relativistic electrons: A strong semiannual modulation
Satellite Relative Motion Using Differential Equinoctial Elements
Solar illumination as cause of the equinoctial preference for geomagnetic activity
Personal Narrative of Travels to the Equinoctial Regions of America During the Years 1799–1804