Intensity, Doppler velocity, and FWHM maps of Fe XII 195.12 Å line, showing the polar jet moving off the limb outwards. The white line is the position of the slit along the jet upon which the spectral parameters are estimated. The footpoint of the jet where the slit’s lowest part lies, has the coordinates of (−28′′, 964′′). The white rectangular box is chosen at the limb of the north polar corona from where the integrated line profile of Fe XII 195.12 Å is derived and fitted to obtain its rest wavelength.