Methods used to process data from bulk water probes, single-particle light-scattering spectrometers and cloud-imaging probes are reviewed herein, with emphasis on measurements of the ice phase. Particular attention is paid to how uncertainties, caveats, and assumptions in processing algorithms affect derived products since there is currently no consensus on the optimal way of analyzing data. Recommendations for improving the analysis and interpretation of in situ data include the following: establishment of a common reference library of individual processing algorithms, better documentation of assumptions used in these algorithms, development and maintenance of sustainable community software for processing in situ observations, and more studies that compare different algorithms with the same benchmark datasets.

- "GREG M. MCFARQUHAR, a,b,m DARREL BAUMGARDNER, c AARON BANSEMER, b STEVEN J. ABEL, d JONATHAN CROSIER, e JEFF FRENCH, f PHIL ROSENBERG, g ALEXEI KOROLEV, h ALFONS SCHWARZOENBOECK, i DELPHINE LEROY, i JUNSHIK UM, a WEI WU, a,b ANDREW J. HEYMSFIELD, b CYNTHIA TWOHY, j ANDREW DETWILER, k PAUL FIELD, d,g ANDREA NEUMANN, l RICHARD COTTON, d DUNCAN AXISA, b AND JIAYIN DONGa"