In this chapter we show the status of the scientific validity of products of the ISOPHOT AOTs as of OLP v10. The scientific validity of an observing mode is decided after thorough evaluation of the corresponding Auto Analysis (AAR) products (see Chapter 8) of observations of known test targets. Only when the results are according to the expectations a mode is declared `scientifically valid'. A detailed description of the validation of ISOPHOT observing modes can be found in Klaas & Richards 2002,[27]
The reliability of the OLP products is best described by the photometric accuracies that can be achieved per observing mode. The photometric accuracies for those modes that are scientifically validated as of OLP v10 are presented in detail in the document `ISOPHOT Calibration Accuracies' by Klaas et al. 2002, [26]. A full discussion of the error budgets and resulting uncertainties is given in the document `ISOPHOT Error Budgets' by [31]. The tables presented in the following sections were taken from Klaas et al. (2001) [28].