Abstract: An interference signal canceling system for communications protection is described for canceling interference signals from earth station received signals using a two input adaptive cancellation network. The present invention addresses terrestrial, co-channel and adjacent satellite interference sources resulting from emitting, isolated, frequency re-use and polarized sources. Main and auxiliary signals are derived directly or by coherent conversion to intermediate frequency using an auxiliary antenna, cross-polarized feed, or auxiliary squinted feed. Filters set receive and canceling bands. Cancellation combines the main signal with a phase, amplitude and time modulated sample of the auxiliary signal. A receiver correlates the auxiliary signal with a sample of the combined output to minimize interference. A control drives the modulator from internal measurements, or satellite receiver measurements, i.e., BER, C/No, SNR, etc., or both.

Abstract: A narrowband interference excision and nulling system for Global Positioning Satellite (GPS), spread spectrum navigation and communication bands, and an antijam electronic apparatus that operates using RF conversion and digital signal processing. A band containing the signal of interest as well as interference is converted to an intermediate frequency (IF) for RF filtering using single conversion, and this signal is digitized using an analog-to-digital converter (ADC). A representation of the signal is produced at a lower frequency using digitization and filtering, and a continuous data representation of the band is processed using multiple-point samples to define the input to a complex FFT. The FFT produces contiguous frequency bins that are examined to identify narrowband and broadband interference.

Abstract: The anti-fouling compositions and process described herein are capable of preventing or delaying for prolonged periods the fouling of structures such as boats, ships, piers, etc., having substantial portions thereof submerged in water. These compositions comprise a number of components, some of which may be coreacted, including: (a) an organic polymeric material having carboxylic acid groups therein which have been reacted with a trihydrocarbyl tin compound to produce ester derivative groups therein; (b) a hydrophilic component having poor water solubility, preferably being water insoluble, polyvinyl acetate and copolymers of vinyl chloride and vinyl acetate; (c) a hydrophobic component comprising a compound having 1-3 urethane groups therein and no more than about 20 carbon atoms preferably made by the reaction of an isocyanate compound, such as diisocyanate, with one or more hydroxy-containing solvents, such as ethanol, propanol, ethylene glycol monoethyl ether, etc.

Abstract: The anti-fouling compositions and process described herein are capable of preventing or delaying for prolonged periods the fouling of structures such as boats, ships, piers, etc., having substantial portions thereof submerged in water. Processes are described herein for preparing and applying these compositions as coatings to objects to be submerged in sea water. These compositions comprise a number of components, some of which may be reacted, including: (a) an organotin polymer or copolymer of the monomer having the formula R.sub.3 SnOOCR', wherein R and R' are defined hereinafter; (b) a hydrophilic component having poor water solubility, preferably being water insoluble and having at least two hydroxy groups per molecule, such as caster oil, partially hydrolyzed polyvinyl acetate, partially hydrolyzed copolymers of vinyl chloride and vinyl acetate, polymers of monovinyl ether of alkylene glycols such as ethylene glycol, etc.

Abstract: The anti-fouling compositions and process described herein are capable of preventing or delaying for prolonged periods the fouling of structures such as boats, ships, piers, etc., having substantial portions thereof submerged in water. Processes are described herein for preparing and applying these compositions as coatings to objects to be submerged in sea water.

Abstract: A non-leaching coating composition useful in preventing fouling of marine structures submerged in water which composition is prepared as a single component composition by comingling a polyol reactive organic polyisocyanate, a hydroxy functional acylic polymer, and an organotin polymer in the presence of a reactivity suppressant solvent medium comprising a mixture of low molecular weight ketones and hydroxy-functional ether or low molecular weight aliphatic alcohol compounds.

Abstract: A method for making a slurry containing particulate matter and fibers for a preformed insulation product comprises mixing dry particulate matter with a binder which is a liquid containing dispersed fibers. An apparatus suitable for practicing the method comprises a means for disposing the particulate matter in the form of a falling curtain and a means for spraying the binder on the particulate matter.

Abstract: A method for making a slurry containing particulate matter and fibers for a preformed insulation product comprises mixing dry particulate matter with a binder which is a liquid containing dispersed fibers. An apparatus suitable for practicing the method comprises a means for disposing the particulate matter in the form of a falling curtain and a means for spraying the binder on the particulate matter.

Abstract: A method for making a slurry containing particulate matter and fibers for a preformed insulation product comprises mixing dry particulate matter with a binder which is a liquid containing dispersed fibers. An apparatus suitable for practicing the method comprises a means for disposing the particulate matter in the form of a falling curtain and a means for spraying the binder on the particulate matter.