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mplex organic compounds can therefore only be measured using in-situ methods. Continuous measurement of key substances, re resentative of certain compound classes, accompanied by detailed anal ses of grab sampks is advantageous for in-situ recording of organicairpollutants.Thisidea ~asalreadybeenappliedtothecontroiofpollutantsatthework place and to the assessment of indoor air pollution. In order to implement this concept in air- craft measurement systems, techniques for continuous measurement of represen-tative organic substances must be first developed together with specific fast grab sam ling methods. Continuous measurementwith time resolution of lessthan onesecond woul$BIso allow direct flux determination. Existing analytical methods used in research indicate that the proposed concept can be realizedfortheanalysisofgrabsamples bycombiningspectroscopic or mass spectrometric methods for fast continuous measurement with gas chromatography- mass spectrometry or mass spectrometry-mass spectrometry , Routine monitoring of emissions and atmospheric distribution of pollutants fromaircraft iscur- rently still too expensive. The costs may be considerably reduced by using smaller air planes. However, this requires considerable developmental effort to miniaturize currently available instruments for atmospheric measurements. Further savin can be achieved through impro- vements in instrument reliability leading to consequent rejuction in required data evaluation efforts. Even with relatively small savings, routine monitoring of air uality using air planes could very well be less expensive today (for countries without netwoxs for emission and air qualit control) than construction and maintainance of complicated measurement surface- based/network. 1 Duration: 0 0 9 - 3 0 9 OlVQ9 Subject: Collaborative project Measuring systems for highly volatile organic hydrocarbons - Sub-project Remote sensing measurements for interferometric determination of the