Equatorial E and F region zonal electric fields in the postsunset period

摘要

The E and F region eastward electric fields in the postsunset period obtained from VHF backscatter radar and ionosonde observations respectively at the magnetic equatorial station at Trivandrum are compared. It is found that the F region eastward electric field is greater than the E region electric field indicating latitudinal gradients in the E region electric field.