Secondly, other parameters such as temperature difference and emissivity of target and sky, molecular absorptive transmittance, instantaneous field of view (IFOV), contrast threshold and radiant wavelength are discussed in detail.

• 然后，对目标天空背景温差、发射率，气溶胶衰减系数，瞬时视场、对比度探测阈值以及辐射波长等参数作了详细讨论。