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A Proposed Signal Design for GNSS2:The Use of Faster and Longer Codes to Provide Real-Time Single Frequency Ionospheric Measurements
Signal Design GNSS Longer Codes Real-Time Single Frequency Ionospheric Measurements
2015/6/29
The design of GNSS2 presents the international navigation community a unique opportunity to design a signal for more precise positioning than is currently available with GPS and GLONASS. Faster and lo...
Techniques for Graceful Reversion from Dual to Single Frequency WAAS
Techniques Graceful Reversion Single Frequency WAAS
2015/6/26
This paper investigates techniques to sustain dual frequency ionosphere performance when a dual-frequency airborne user loses all but one GPS frequency while descending into the radio frequency interf...
The Effects of Large Ionospheric Gradients on Single Frequency Airborne Smoothing Filters for WAAS and LAAS
Large Ionospheric Gradients Single Frequency Airborne Smoothing Filters WAAS LAAS
2015/6/26
Both WAAS and LAAS receivers use carrier-smoothing filters to reduce the effects of multipath and thermal noise at the aircraft. For the majority of users this reduces the magnitude of the errors and ...
Optimizing WAAS Accuracy/Stability For a Single Frequency Receiver
Optimizing WAAS Accuracy/Stability Single Frequency Receiver
2015/6/26
The Wide Area Augmentation System (WAAS) provides accuracy (95%) to better than 1m in horizontal and 2m in vertical, which is quite an improvement compared to the stand-alone GPS accuracy and well wit...
A Reference Point-based Precise Relative Positioning Method Using a Single Frequency Receiver
Point-based Precise Relative Positioning Method Single Frequency Receiver
2015/6/26
This paper investigates how to take advantage of the known position of a point at which a single frequency GPS receiver is located. Using this reference point and a single frequency receiver, a precis...
High power monolithic all-fiber counter-propagating pumped single-frequency amplifier
High power monolithic all-fiber counter-propagating pumped single-frequency amplifier
2015/5/20
We present a monolithic all-fiber, counter-propagating pumped, single-frequency amplifier with an output power of 47 W.
Single-Frequency Hybrid Brillouin/Ytterbium Fiber Laser with 1-W Output Power
Lasers fiber Lasers ytterbium Nonlinear optics fibers
2015/6/8
A high-power hybrid Brillouin/ytterbium fiber laser is demonstrated with an output power of 1 W. The laser operates in the single-frequency regime with an optical signal-to-noise ratio greater than 55...
Single Frequency free-runing low noise compact External-Cavity VCSELs at high power level (50mW)
Single Frequency free-runing low noise compact External-Cavity VCSEL high power level
2015/8/6
We present a highly coherent semiconductor device formed by a ½-VCSEL and an external concave mirror. The low noise single-frequency TEM00 laser exhibits 50mW output power with a linewidth <1kHz.
Single-frequency laser at 473 nm by use of twisted-mode technique
Single-frequency Twisted-mode Diode-end-pump
2011/12/6
We experimentally demonstrate an all solid-state laser producing single-frequency output at 473 nm. Spatial gain hole-burning in the gain material has been eliminated by use of twisted-mode cavity app...