Atmospheric absorption determination using embedded sensor data

1 . A system comprising:

a housing;

a sensing device within the housing, wherein the sensing device is configured to determine a humidity within the housing and a temperature within the housing; and

a logic device configured to:

compensate the humidity and the temperature for heat within the housing from heat sources within the housing based on a location of the sensing device within the housing relative to the heat sources within the housing;

determine a moisture value based on compensation of the humidity and the temperature for the heat within the housing from the heat sources; and

determine an atmospheric absorption value based on the moisture value.

2 . The system of claim 1 , wherein the logic device is configured to compensate the humidity and the temperature to obtain a compensated humidity value and a compensated temperature value, and wherein the moisture value is based on the compensated humidity value and the compensated temperature value.

3 . The system of claim 2 , further comprising a printed circuit board within the housing comprising heat dissipating electronics, wherein the heat sources comprise the heat dissipating electronics.

4 . The system of claim 3 , wherein the logic device is implemented by the printed circuit board.

5 . The system of claim 1 , further comprising a fan within the housing and electronics within the housing, wherein the heat sources comprise the electronics, wherein the fan is configured to generate a continuous airflow that is heated by the heat sources, and wherein the sensing device is configured to determine the humidity within the housing and the temperature within the housing based on the continuous airflow heated by the heat sources.

6 . The system of claim 1 , further comprising a focal plane array (FPA) configured to capture radiation from a scene and generate infrared image data associated with the scene based on the radiation,

wherein the logic device is further configured to:

receive the infrared image data associated with the scene and process the infrared image data based on the atmospheric absorption value to obtain compensated infrared image data; and

determine a temperature associated with an object in the scene based on the compensated infrared image data, wherein the atmospheric absorption value is associated with an atmosphere between the FPA and the object in the scene.

7 . The system of claim 1 , further comprising a fan within the housing, wherein the fan is configured to receive an external airflow and circulate the external airflow within the housing to provide an internal airflow within the housing, wherein the sensing device is further configured to receive a portion of the internal airflow, and wherein the humidity is based on the portion of the internal airflow.

8 . The system of claim 7 , further comprising a temperature control element positioned between the fan and the sensing device and having a temperature, wherein a temperature of the portion of the internal airflow is based in part on the temperature of the temperature control element.

9 . The system of claim 1 , wherein the sensing device is configured to directly receive an external airflow and configured to determine the humidity based on the external airflow.

10 . The system of claim 9 , further comprising a fan and a temperature control element having a temperature, wherein the fan and the temperature control element are downstream of the sensing device relative to the external airflow, wherein the temperature within the housing is based in part on the temperature of the temperature control element, and wherein the moisture value is an absolute moisture value.

11 . The system of claim 1 , wherein the system is an unmanned aerial system, and wherein the unmanned aerial system comprises a payload including the housing and the sensing device.

12 . A method comprising:

determining, by a sensing device within a housing, a humidity within the housing;

determining, by the sensing device, a temperature within the housing;

compensating the humidity and the temperature for heat within the housing from heat sources within the housing based on a location of the sensing device within the housing relative to the heat sources within the housing;

determining a moisture value based on the compensating; and

determining an atmospheric absorption value based on the moisture value.

13 . The method of claim 12 , wherein the humidity is compensated to obtain a compensated humidity value, wherein the temperature is compensated to obtain a compensated temperature value, and wherein the moisture value is based on the compensated humidity value and the compensated temperature value.

14 . The method of claim 13 , further comprising generating, by a fan, a continuous airflow, wherein the continuous airflow is heated by the heat sources, and wherein the humidity within the housing and the temperature within the housing are based on the heated continuous airflow.

15 . The method of claim 12 , further comprising:

capturing, by a focal plane array (FPA), radiation from a scene;

generating, by the FPA, infrared image data based on the radiation; and

processing the infrared image data based on the atmospheric absorption value to obtain compensated infrared image data.

16 . The method of claim 15 , further comprising determining a temperature associated with an object in the scene based on the compensated infrared image data, wherein the atmospheric absorption value is associated with an atmosphere between the FPA and the object in the scene.

17 . The method of claim 15 , wherein the FPA is mounted as a payload of an aerial vehicle, and wherein the radiation from the scene is captured during a flight of the aerial vehicle.

18 . The method of claim 12 , further comprising:

receiving, by a fan within the housing, an external airflow; and

circulating, by the fan, the external airflow within the housing to provide an internal airflow within the housing, wherein the humidity is based on a portion of the internal airflow, wherein the temperature within the housing is based on a temperature of electronics within the housing and/or a temperature of cooling flanges within the housing.

19 . The method of claim 12 , further comprising receiving, by the sensing device, an external airflow, wherein the humidity is based on the external airflow.

20 . The system of claim 5 , wherein the fan is configured to generate the continuous airflow that is directed to the sensing device and heated by the heat sources.