公开(公告)号：KR100761936B1

公开(公告)日：2007-09-28

申请号：KR1020060047422

申请日：2006-05-26

Applicant: 재단법인서울대학교산학협력재단

Inventor： 최용상 ,  허창회 ,  안명환 ,  김영미

IPC: G01W1/00 ,  G01J5/00 ,  G01K13/00

CPC classification number: G01W1/08 ,  G01J5/00 ,  G01S17/95 ,  G01W1/02 ,  G06F17/10 ,  G06T1/00

Abstract: A method for estimating a temperature and pressure of a cloud top is provided to estimate a temperature and pressure of a cloud top in high level clouds by using only 6.7 and 10.8 microchannels. A method for estimating a temperature and pressure of a cloud top in high level clouds having a cloud optical thickness of less than 10 and a cloud top pressure of not more than 400 hPa at an artificial satellite, comprises the steps of: calculating a radiance ratio between 6.7 micrometers and 10.8 micrometers by dividing a value which is obtained by subtracting a 10.8 micrometers clear-sky radiance from a 10.8 micrometers cloudy-sky radiance, by a value which is obtained by subtracting a 6.7 micrometers clear-sky radiance from a 6.7 micrometers cloudy-sky radiance; and drawing an information about a cloud top by retrieving a cloud top pressure from the calculated radiance ratio using a correlation between a radiance ratio and a cloud top pressure and retrieving a cloud top temperature from the retrieved cloud top pressure using a correlation between a cloud top pressure and a cloud top temperature.

Abstract translation: 提供了一种用于估计云顶温度和压力的方法，以通过仅使用6.7和10.8微通道来估计高层云中云顶的温度和压力。 一种用于估计人造卫星具有云光学厚度小于10且云顶压力不大于400hPa的高云中的云顶的温度和压力的方法包括以下步骤：计算辐射比 通过将通过从10.8微米多云天空辐射度减去10.8微米的透明天空辐射度而获得的值除以通过从6.7微米减去6.7微米的清晰天空辐射而获得的值，在6.7微米与10.8微米之间 多云的天空光芒 并通过使用辐射比和云顶压力之间的相关性从计算的辐射比中检索云顶压力并从所检索的云顶压力中检索云顶温度，并使用云顶之间的相关性来绘制关于云顶的信息 压力和云顶温度。

公开(公告)号：KR100775654B1

公开(公告)日：2007-11-13

申请号：KR1020060047421

申请日：2006-05-26

Applicant: 재단법인서울대학교산학협력재단

Inventor： 최용상 ,  허창회 ,  안명환 ,  김영미

IPC: G01W1/00

CPC classification number: G01W1/08 ,  G01J3/0294 ,  G01S17/95

Abstract: A method for estimating the optical thickness and effective particle radius of cloud is provided to obtain broad information about the atmosphere and weather by merely using 0.6 microchannel and 3.7 microchannel in a satellite capable of measuring cloud radiation luminance. A method for estimating the optical thickness and effective particle radius of cloud comprises the steps of: estimating the ground surface reflective radiances in 0.6 micrometer channel and that in 3.7 micrometer channel by calculating the ground surface reflective radiance in an i channel according to the following formula 3, after obtaining an angle parameter and ground surface albedo by using a reference table including angle parameters for various tau_c(0-64) and gamma_e(0-32 micrometers) and radiances corresponding thereto and prepared based on Ag=0 and 1 where any thermal effect is excluded; estimating the cloud and ground surface heat radiance in 3.7 micrometer channel by using the following formula 4; estimating decoupled radiances for a wavelength of 0.6 and 3.7 micrometer by using the following formulae 1 and 2; and carrying out dependent estimation for the optical thickness and effective particle radius of cloud from the interrelation between the decoupled radiance for 0.6 micrometer and the decoupled radiance for 3.7 micrometers.

Abstract translation: 提供了一种用于估计云的光学厚度和有效粒子半径的方法，通过在能够测量云辐射亮度的卫星中仅使用0.6微通道和3.7微通道来获得关于大气和天气的广泛信息。 用于估计云的光学厚度和有效粒子半径的方法包括以下步骤：通过根据以下公式计算i通道中的地面反射辐射度来估计0.6微米通道中的地面反射辐射和3.7微米通道中的地面反射辐射 3，通过使用参考表获得角度参数和地面反照率，该参考表包括与其对应的各种tau_c（0-64）和gamma_e（0-32微米）和辐射的角度参数，并且基于Ag = 0和1，其中任何 排除热效应; 通过使用以下公式4估计3.7微米信道中的云和地表热辐射; 通过使用以下公式1和2估计波长为0.6和3.7微米的去耦辐射; 并从0.6微米的解耦辐射与3.7微米的去耦辐射之间的相互关系，对云的光学厚度和有效粒子半径进行依赖估计。

公开(公告)号：KR100740347B1

公开(公告)日：2007-07-18

申请号：KR1020060046994

申请日：2006-05-25

Applicant: 재단법인서울대학교산학협력재단

Inventor： 최용상 ,  허창회 ,  안명환 ,  김영미

IPC: G01W1/00

Abstract: Provided a method for retrieving cloud thermodynamic phase using 6.7 micro channel capable of substituting 8.7mum band used in the conventional cloud thermodynamic phase analysis algorithm using MODIS 3 channel spectrum with 6.7mum band so as to improve ice cloud retrieval. The method includes the steps of judging a cloud pixel having 10.8mum brightness temperature(BT_ 10.8) of less than 238K, bright temperature difference between 10.8mum and 12.0mum (BT_10.8-12.0) of 4.5K or more or 6.7mum brightness temperature(BT_6.7) of less than 234K as the ice phase, judging remaining cloud pixel having 10.8mum brightness temperature(BT_10.8) of 238K or more and less than 268K, or 6.7mum brightness temperature(BT_6.7) of 234K or more and less than 250K as the mixture phase, and judging remaining cloud pixel having 10.8mum brightness temperature(BT_10.8) of 285K or more, or 6.7mum brightness temperature(BT_6.7) of 250K or more as the water phase. The method further includes the step of judging a cloud pixel which is not judged as the water phase as an un-identified phase.

Abstract translation: 提供了一种利用6.7微米通道替代传统云云热力学相位分析算法中使用的8.7微米波段的云热力学相位的方法，该方法使用MODIS 3信道频谱，波段为6.7mum，以改善冰云的恢复。 该方法包括以下步骤：判断10.8m亮度温度（BT_10.8）小于238K，10.8mum至12.0mum（BT_10.8-12.0）亮温差为4.5K或更高或6.7m亮度温度 （BT_6.7）小于234K作为冰相，判断剩余的云像素具有238K以上且小于268K的10.8m亮度温度（BT_10.8）或234K的6.7m亮度温度（BT_6.7）或 作为混合相大于或等于250K，并且剩余云像素具有285K或更高的10.8m亮度温度（BT_10.8）或250K或更高的6.7m亮温（BT_6.7）作为水相。 该方法还包括将未被判断为水相的云像素判断为未识别的相位的步骤。