Scientists have carefully checked these observations to exclude observational errors and other influences - such as the urban heat island effect and localised warming due to land surface changes.
科学家们谨慎地监测那些观测，以排除观测误差和其它影响，诸如城市的热岛效应和由于地表变化导致的局部升温。
The second part shows GPS observational equation, the corresponding error sources, the characteristics of errors and the essential methods for error processing.
第二是有关GPS观测方程和相关误差产生的原因，分析了误差的特点和处理的基本方法。
The second part shows GPS observational equation, the corresponding error sources, the characteristics of errors and the essential methods for error processing.
第二是有关GPS观测方程和相关误差产生的原因，分析了误差的特点和处理的基本方法。
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