TIDEP-01012: Why does the phase shifter calibration matrix only encompass angles from -15 to 15 degrees?

I noticed that the calibration matrix is limited to a 30 degree beamwidth. Does this mean that in the MATLAB TXBF configuration script 'chirpProfile_TxBF_USRR.m', the default 'params.anglesToSteer=-30:2:30; ' is not valid? Or do the calibration values repeat outside of [-15,15]? Based on the psCalLUT in 'Cascade_Configuration_TXBF_AngleSweep.lua', the calibration only applies for 75 to 105 deg (-15 to 15 about 90 degrees)