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A system for operating a gas turbine includes a compressor, a combustor, and a turbine. The combustor and turbine define a hot gas path. A sensor disposed outside the hot gas path measures internal thermal emissions from the combustor or turbine and generates a first signal reflective of the interna

A system for operating a gas turbine includes a compressor, a combustor, and a turbine. The combustor and turbine define a hot gas path. A sensor disposed outside the hot gas path measures internal thermal emissions from the combustor or turbine and generates a first signal reflective of the internal thermal emissions. The internal thermal emissions are infrared or ultraviolet emissions. A controller connected to the sensor receives the first signal and adjusts the compressor, combustor, or turbine in response to the first signal from the sensor. A method for operating a gas turbine includes measuring internal thermal emissions from inside a combustor or turbine using a sensor disposed outside the hot gas path. The method further includes generating a first signal reflective of the internal thermal emissions and adjusting the operation of the compressor, combustor, or turbine in response to the first signal from the sensor.

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1. A system for operating a gas turbine, comprising: a. a compressor;b. a combustor downstream of the compressor, the combustor having a liner and a transition piece defining a hot gas through the combustor;c. a turbine downstream of the combustor, wherein the turbine further defines the hot gas pat

1. A system for operating a gas turbine, comprising: a. a compressor;b. a combustor downstream of the compressor, the combustor having a liner and a transition piece defining a hot gas through the combustor;c. a turbine downstream of the combustor, wherein the turbine further defines the hot gas path;d. a sensor disposed entirely outside the hot gas path, wherein the sensor is pointed at and in direct sight with an outer surface of a flow sleeve surrounding at least one of the liner and the transition piece, and wherein the sensor measures external thermal emissions of said outer surface of the at least one of the liner and the transition piece, and generates a signal reflective of the external thermal emissions, wherein the external thermal emissions comprise at least one of infrared or ultraviolet emissions; ande. a controller connected to the sensor to receive the signal, wherein the controller adjusts at least one of the compressor, combustor, or turbine in response to the signal from the sensor. 2. The system as in claim 1, wherein the compressor includes an inlet guide vane having an adjustable position, and the controller adjusts the adjustable position of the inlet guide vane in response to the signal from the sensor. 3. The system as in claim 1, wherein the combustor includes a variable fuel supply, and the controller adjusts the variable fuel supply in response to the signal from the sensor. 4. The system as in claim 1, further including an access port between the sensor and the external thermal emissions. 5. The system as in claim 1, further including a communications device connected to the controller, wherein the controller actuates the communications device in response to the signal from the sensor. 6. A system for operating a gas turbine, comprising: a. a compressor;b. a combustor downstream of the compressor, the combustor having at least one of a liner and a transition piece defining a hot gas path through the combustor;c.d. a sensor disposed entirely outside the hot gas path, wherein the sensor is pointed at and in direct sight with an outer surface of a flow sleeve surrounding at least one of the liner and the transition piece, and pointed at an outer wall portion of at least one of the liner and the transition piece, wherein the sensor measures; i.ii. external thermal emissions from said outer surface and generates a signal reflective of the external thermal emissions;iii. wherein the external thermal emissions comprise at least one of infrared or ultraviolet emissions; ande. a controller connected to the sensor to receive the signal, wherein the controller adjusts at least one of the compressor, combustor, or turbine in response to the signal from the sensor. 7. The system as in claim 6, wherein the compressor includes an inlet guide vane having an adjustable position, and the controller adjusts the adjustable position of the inlet guide vane in response to the signal from the sensor. 8. The system as in claim 6, wherein the combustor includes a variable fuel supply, and the controller adjusts the variable feel supply in response to the signal from the sensor. 9. The system as in claim 6, further including an access port between the sensor and the external emissions. 10. The system as in claim 6, further including a communications device connected to the controller, wherein the controller actuates the communications device in response to the signal from the sensor. 11. A method for operating a gas turbine having a compressor, a combustor, and a turbine, wherein the combustor includes at least one of a liner and a transition piece defining a hot gas path through the combustor, and wherein the turbine further defines the hot gas path, the method comprising: a. measuring external thermal emissions from an outer surface of a flow sleeve surrounding at least one of the liner and the transition piece using a sensor disposed entirely outside of the hot gas path, wherein the sensor is pointed at and in direct sight with said outer surface, and wherein the external thermal emissions comprise at least a one of infrared or ultraviolet emissions;b. generating a signal reflective of the external thermal emissions;c. adjusting the operation of at least one of the compressor, combustor, or turbine in response to the signal from the sensor. 12. The method as in claim 11, further comprising adjusting an inlet guide vane in the compressor in response to the signal from the sensor. 13. The method as in claim 11, further comprising adjusting a variable fuel supply to the combustor in response to the signal from the sensor. 14. The method as in claim 11, further comprising measuring the external thermal emissions through an access port between the sensor and the external emissions. 15. The method as in claim 11, further comprising actuating a communications device in response to the signal from the sensor.