Abstract: This paper delas with the remote sensing system dDIM, which operates in the pulse mode using tunable diode lasers. The dDIM system enables the simultaneous sensing of two gaseous pollutants through the parallel operation of two diode lasers using the same optical path. The respective laser pulses are offset in time. The special features of this system are its compact size (325mm by 142mm by 375mm) and its stand-alone, mains-independent operation, which permits flexible and mobile use. This paper introduces the initial results of the application of dDIM in measuring methane while monitoring a landfill. The measurements were undertaken in comparison to a conventional measuring device. The influence of band overlapping in measuring methane at atmospheric pressure will be further dealt with using simulations. !7
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机译：摘要：本文介绍了遥感系统dDIM，该系统使用可调谐二极管激光器以脉冲模式运行。 dDIM系统通过使用同一光路的两个二极管激光器的并行操作，能够同时感测两种气态污染物。各个激光脉冲在时间上偏移。该系统的特殊功能是其紧凑的尺寸（325mm x 142mm x 375mm）以及独立的，独立于电源的操作，允许灵活和移动的使用。本文介绍了dDIM在监测垃圾填埋场的甲烷测量中应用的初步结果。与常规测量设备相比，进行了测量。在大气压下测量甲烷时，谱带重叠的影响将通过模拟进一步处理。 ！7
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