Fig. 4
From: In-ice light measurements during the MOSAiC expedition
Sketch of the vertical (a) and horizontal (b) calibration measurements performed with the lightharp under diffuse illumination conditions. The uppermost sensor for downwelling light I0, b, d for different spectral bands b was used as the reference sensor for mutual differences. In the horizontal calibration, the differences between the sensor modules pointing upwards at one point in time were compared and the calibration coefficients were derived continuously from the reference module to the corrected sensor. The temporal evolution of incident light in different spectral bands Irradb(t) was derived from the uppermost sensors.
