The drastic rise in the number of objects in space and the proliferation of large constellations ... more The drastic rise in the number of objects in space and the proliferation of large constellations of commercial and government satellites is driving the need for rapid location, identification, discrimination, and attribution of noncooperative space-borne objects. Traditionally, these needs have been addressed by two fundamental phenomenologies; Ground-Based Radar (GBR) systems and Electro-Optical (EO) sensors. This paper presents and highlights EOand GBR-augmentation from passive Radio Frequency (RF), a powerful Space Domain Awareness (SDA) phenomenology. Passive RF provides important techniques for uniquely identifying and locating objects. Specific Emitter Identification (SEI) can occur when passive RF fingerprints are combined with Passive RF Ranging (PRFR) data.
Ionospheric scintillation induces distortion onto RF
communication and radar signals that propaga... more Ionospheric scintillation induces distortion onto RF communication and radar signals that propagate through the ionospheric medium. Unless properly accounted for, this scintillation may greatly impact the performance of military and commercial satellite signals. Accurate verification of satellite systems and associated ground equipment is achievable through the use of hardware-in-the-loop (HWIL) scintillation simulators. Test results of a scintillation simulator are presented and compared with theoretical performance of Rayleigh, Rician, and Nakagami-m fading.
This paper describes the architecture of a fully digitul receiver designed for Global Positioning... more This paper describes the architecture of a fully digitul receiver designed for Global Positioning System (GPS) satellite radionavigation and other spread spectrum applications. By directly sampling L-band radio frequencies with a minimum of analog components, phase coherent ...
... Mark A. Wickert, Member, IEEE, and William S. Sward, Member, IEEE ... William S. Sward (M&... more ... Mark A. Wickert, Member, IEEE, and William S. Sward, Member, IEEE ... William S. Sward (M'94) received the BSEE degree from Iowa State University, Ames, in 1983, and the MSEE degree from the University of Colorado at Colorado Springs in 1996. ...
The drastic rise in the number of objects in space and the proliferation of large constellations ... more The drastic rise in the number of objects in space and the proliferation of large constellations of commercial and government satellites is driving the need for rapid location, identification, discrimination, and attribution of noncooperative space-borne objects. Traditionally, these needs have been addressed by two fundamental phenomenologies; Ground-Based Radar (GBR) systems and Electro-Optical (EO) sensors. This paper presents and highlights EOand GBR-augmentation from passive Radio Frequency (RF), a powerful Space Domain Awareness (SDA) phenomenology. Passive RF provides important techniques for uniquely identifying and locating objects. Specific Emitter Identification (SEI) can occur when passive RF fingerprints are combined with Passive RF Ranging (PRFR) data.
Ionospheric scintillation induces distortion onto RF
communication and radar signals that propaga... more Ionospheric scintillation induces distortion onto RF communication and radar signals that propagate through the ionospheric medium. Unless properly accounted for, this scintillation may greatly impact the performance of military and commercial satellite signals. Accurate verification of satellite systems and associated ground equipment is achievable through the use of hardware-in-the-loop (HWIL) scintillation simulators. Test results of a scintillation simulator are presented and compared with theoretical performance of Rayleigh, Rician, and Nakagami-m fading.
This paper describes the architecture of a fully digitul receiver designed for Global Positioning... more This paper describes the architecture of a fully digitul receiver designed for Global Positioning System (GPS) satellite radionavigation and other spread spectrum applications. By directly sampling L-band radio frequencies with a minimum of analog components, phase coherent ...
... Mark A. Wickert, Member, IEEE, and William S. Sward, Member, IEEE ... William S. Sward (M&... more ... Mark A. Wickert, Member, IEEE, and William S. Sward, Member, IEEE ... William S. Sward (M'94) received the BSEE degree from Iowa State University, Ames, in 1983, and the MSEE degree from the University of Colorado at Colorado Springs in 1996. ...
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communication and radar signals that propagate through the
ionospheric medium. Unless properly accounted for, this
scintillation may greatly impact the performance of military and
commercial satellite signals. Accurate verification of satellite
systems and associated ground equipment is achievable through
the use of hardware-in-the-loop (HWIL) scintillation simulators.
Test results of a scintillation simulator are presented and
compared with theoretical performance of Rayleigh, Rician, and
Nakagami-m fading.
communication and radar signals that propagate through the
ionospheric medium. Unless properly accounted for, this
scintillation may greatly impact the performance of military and
commercial satellite signals. Accurate verification of satellite
systems and associated ground equipment is achievable through
the use of hardware-in-the-loop (HWIL) scintillation simulators.
Test results of a scintillation simulator are presented and
compared with theoretical performance of Rayleigh, Rician, and
Nakagami-m fading.