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A method for operating a fuel quantity gauging system is described. The method includes utilizing redundant sensor sets at separate locations within a fuel tank to measure properties of the fuel mixture within the fuel tank, inputting the measured properties into a fuel regression equation, a separa

A method for operating a fuel quantity gauging system is described. The method includes utilizing redundant sensor sets at separate locations within a fuel tank to measure properties of the fuel mixture within the fuel tank, inputting the measured properties into a fuel regression equation, a separate fuel regression equation for each sensor set location, solving the multiple fuel regression equations to determine a slope and intercept and define a fuel regression curve for the fuel mixture, and utilizing the defined fuel regression curve to calculate at least a quantity of fuel in the fuel tank.

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1. A method for operating a fuel quantity gauging system, said method comprising: using at least one pump to blend a first fuel from a first fuel source with a second fuel from a second fuel source to produce a fuel mixture within a fuel tank;utilizing redundant sensor sets at separate locations wit

1. A method for operating a fuel quantity gauging system, said method comprising: using at least one pump to blend a first fuel from a first fuel source with a second fuel from a second fuel source to produce a fuel mixture within a fuel tank;utilizing redundant sensor sets at separate locations within the fuel tank to measure properties of the fuel mixture within the fuel tank, wherein the redundant sensor sets include a first sensor set in a feed box area in the fuel tank and a second sensor set in an inboard tank compartment in the fuel tank;inputting, using a fuel quantity computer coupled to the redundant sensor sets, the measured properties from the feed box area into a first instance of a fuel regression equation, wherein the first instance of the fuel regression equation includes an unknown intercept A and an unknown slope B;inputting, using the fuel quantity computer, the measured properties from the inboard tank compartment into a second instance of the fuel regression equation, wherein the second instance of the fuel regression equation includes the unknown intercept A and the unknown slope B;solving, using the fuel quantity computer, for the unknown intercept A and the unknown slope B by combining the first and second instances of the fuel regression equation, wherein the solved slope B and the solved intercept A define a fuel regression curve; andutilizing the defined fuel regression curve to calculate at least a quantity of fuel in the fuel tank. 2. A method according to claim 1 wherein the fuel regression equation is expressed as K−1/D=A+B(K−1), where K is a dielectric constant, and D is a density. 3. A method according to claim 1 wherein utilizing redundant sensor sets at separate locations comprises utilizing each of a densitometer, to provide fuel mixture density data, D, and a compensator, to provide a dielectric constant of the fuel mixture, K, at each sensor set location. 4. A method according to claim 3 further comprising determining a temperature of the fuel mixture based on the data from the densitometer. 5. A method according to claim 1 wherein utilizing redundant sensor sets at separate locations comprises utilizing redundant sensor sets at separate locations each having a different fuel temperature. 6. A method according to claim 1 wherein utilizing the defined fuel regression curve to calculate at least a quantity of fuel in the fuel tank comprises utilizing the defined fuel regression curve to calculate at least one of a volume and a mass of the fuel in the fuel tank. 7. A method according to claim 6 further comprising configuring the fuel quantity computer to utilize the defined regression curve. 8. A method according to claim 1 further comprising: utilizing the defined fuel regression curves for a plurality of fuel tanks to determine a quantity of fuel in each fuel tank; andcalculating at least one of a total fuel onboard a vehicle and a center of gravity of fuel in each of the fuel tanks. 9. A fuel quantity gauging system comprising: at least one pump configured to blend a first fuel from a first fuel source with a second fuel from a second fuel source to produce a fuel mixture within a fuel tank;a first set of sensors disposed in a feed box area in the fuel tank;a second set of sensors disposed in an inboard tank compartment in the fuel tank; anda fuel quantity computer communicatively coupled to said first set and said second set of sensors, said computer programmed to: place data acquired at the feed box area with said first set of sensors into a first instance of a fuel regression equation, wherein the first instance of the fuel regression equation includes an unknown intercept A and an unknown slope B;place data acquired at the inboard tank compartment with said second set of sensors into a second instance of the fuel regression equation, wherein the second instance of the fuel regression equation includes the unknown intercept A and the unknown slope B;solve for the unknown intercept A and the unknown slope B by combining the two fuel regression equation instances, wherein the solved slope B and the solved intercept A define a fuel regression curve; andutilize the defined fuel regression curve in the calculation of a fuel quantity for the fuel tank. 10. A fuel quantity gauging system according to claim 9 wherein said sets of sensors each comprise: a densitometer configured to provide data to said fuel quantity computer relating to a density, D, of the fuel within a fuel tank; anda compensator configured to provide data to said fuel quantity computer relating to a dielectric constant, K, of the fuel mixture within the fuel tank. 11. A fuel quantity gauging system according to claim 10 wherein the fuel regression equation is expressed as K−1/D=A+B(K−1), where K is the dielectric constant, and D is the density. 12. A fuel quantity gauging system according to claim 10 wherein said densitometer is configured to provide temperature data to said fuel quantity computer. 13. A fuel quantity gauging system according to claim 9 wherein a fuel temperature at the first location is different than a fuel temperature at the second location. 14. A fuel quantity gauging system according to claim 9 further comprising a user interface, said user interface operable to initiate operation of said fuel quantity computer to calculate updated fuel regression curves, and fuel quantity, utilizing data provided by said first set of sensors and said second set of sensors. 15. A fuel quantity gauging system according to claim 9 comprising a plurality of fuel tanks, each having a said first set of sensors and a said second set of sensors disposed therein communicatively coupled to said fuel quantity computer, said fuel quantity computer is programmed to: define fuel regression curves for each of said fuel tanks;utilize the defined fuel regression curves to determine a quantity of fuel in each said fuel tank; andcalculate at least one of a total fuel onboard a vehicle and a center of gravity of the fuel in each said fuel tank. 16. A method for deriving a fuel regression curve of a fuel mixture, the regression curve useful in fuel quantity derivations associated with the fuel mixture, said method comprising: using at least one pump to blend a first fuel from a first fuel source with a second fuel from a second fuel source to produce the fuel mixture within a fuel tank;receiving, at a fuel quantity computer, data associated with a density, a dielectric constant, and a temperature of the fuel mixture, from a plurality of locations within the fuel tank, wherein the plurality of locations include at least a feed box area in the fuel tank and an inboard tank compartment in the fuel tank;inputting, using the fuel quantity computer, for each of the locations within the fuel tank, the received data into a respective instance of a fuel regression equation expressed as K−1/D=A+B(K−1), where K is the dielectric constant, D is the density, A is an unknown intercept and B is an unknown slope of the fuel regression curve; andsolving, at the fuel quantity computer, for the unknown intercept A and the unknown slope B by combining the multiple instances of the fuel regression equation. 17. A method according to claim 16 wherein receiving data associated with a density, a dielectric constant, and a temperature of the fuel mixture, from a plurality of locations within the fuel tank comprises utilizing redundant sensor sets at a plurality of separate locations within the fuel tank. 18. A method according to claim 16 further comprising: defining the fuel regression curve for the fuel mixture from the solved intercept A and the solved slope B; andutilizing the defined fuel regression curve to calculate a quantity of fuel within the fuel tank.