Time series of hot-cold load-calibration scans (in the GREAT L2 channel), displayed across the central part of the IF band of width 1.4 GHz, calibrated against the previous load scan and normalized to the R-J-corrected hot-cold brightness difference. It shows that the receiver gain drifts by up to a few percent over time scales of several minutes. The sequence number and time offset to the previous scan is given in the bottom left corner of each panel.