###### Volume 57, Number 5, October 2021
Erratum to "Fast Nonsingular Terminal Sliding Mode Flight Control for Multirotor Aerial Vehicles". A Gaussian Filtering Method for Multitarget Tracking With Nonlinear/Non-Gaussian Measurements. BEP Estimation by Weighted Least Squares From the Ratios of Frame Syncword Error Rates. Agile Earth Observation Satellite Scheduling With a Quantum Annealer. Robust Minimum Variance Beamforming With Sidelobe-Level Control Using the Alternating Direction Method of Multipliers. Robustness of Incremental Backstepping Flight Controllers: The Boeing 747 Case Study. Simple and Effective GNSS Spatial Processing Using a Low-Cost Compact Antenna Array. Fast Sidelobe Suppression Based on Two-Dimensional Joint Iterative Adaptive Filtering. A Combined Linear-Quadratic/Bounded Control Differential Game Guidance Law. Optimized Masking for MIMO Radar Signals. Multistatic Localization in Partially Dynamic Scenario With Only Sensor Positions Available. Passive Radar Transmitter Localization Using a Planar Approximation. Antidisturbance Controllability Analysis and Enhanced Antidisturbance Controller Design With Application to Flexible Spacecraft. Prediction of Motion Simulator Signals Using Time-Series Neural Networks. Unmanned Aerial Vehicle Recognition of Maritime Small-Target Based on Biological Eagle-Eye Vision Adaptation Mechanism. Cooperative Target Capture Using Relative Separation for Three-Dimensional Engagement. Adaptive Fault Tolerant Flight Control for Input Redundant Systems Using a Nonlinear Reference Model. Computationally Efficient SDRE Control Design for 3-DOF Helicopter Benchmark System. Observer-Based Spacecraft Formation Coordinated Control via a Unified Event-Triggered Communication. Field-of-View Constrained Impact Time Guidance Against Stationary Targets. Low-Thrust Reconfiguration Strategy and Optimization for Formation Flying Using Jordan Normal Form. Track Segment Association in Target Selection for Interdiction Using a Single Passive Sensor. Analysis of Micro-Doppler Signatures of Small UAVs Based on Doppler Spectrum. Mixed RF/FSO Deep Space Communication System Under Solar Scintillation Effect. Moving Target Detection Based on Time Reversal in a Multipath Environment. Cooperative Blind Spectrum Detection With Doolittle Decomposition and PCA-SVM Classification in Hybrid GEO-LEO Satellite Constellation Networks. Efficient Bias Estimation in Airborne Video Georegistration for Ground Target Tracking. Combined Effects of Geometric Rotation and Antenna Calibration Patterns on GNSS Phase Windup. Scan Planning Optimization for 2-D Beam Scanning Using a Future Geostationary Microwave Radiometer. 3D Mapping Database-Aided GNSS RTK and Its Assessments in Urban Canyons. A Method for Radar Model Identification Using Time-Domain Transient Signals. Spacecraft Relative Trajectory Planning Based on Meta-Learning. Distributed Nonlinear Fusion Estimation Without Knowledge of Noise Statistical Information: A Robust Design Approach. Optimal Geometry Analysis for TDOA-Based Localization Under Communication Constraints. Distributed State Estimation for Stochastic Linear Hybrid Systems With Finite-Time Fusion. Collision-Free Trajectory Design for Long-Distance Hopping Transfer on Asteroid Surface Using Convex Optimization. Modified Adaptive Pulse Compression Algorithm for Targets With Range-Straddling. Estimation of Complex High-Resolution Range Profiles of Ships by Sparse Recovery Iterative Minimization Method. Passive Radar Signal Processing in the Presence of Sample Clock Offset. Joint Estimation of Target Parameters and System Deviations in MIMO Radar With Widely Separated Antennas on Moving Platforms. An Improvement in Three-Dimensional Pure Proportional Navigation Guidance. Robust Modeling of GNSS Tropospheric Delay Dynamics. False-Target Recognition Against Interrupted-Sampling Repeater Jamming Based on Integration Decomposition. SMC-Based Integrated Guidance and Control for Beam Riding Missiles With Limited LBPU. Tracking Rotations Using Maximum Entropy Distributions. A Reinforcement Learning Approach for Transient Control of Liquid Rocket Engines. Adaptive and Dynamically Constrained Process Noise Estimation for Orbit Determination. Adaptive Spatial Hybrid Nulling of Extremely Strong Interfering Signals. A DC-Coupled, HBT-Based Transimpedance Amplifier for the LISA Quadrant Photoreceivers. Radar-Based Human Activity Recognition Using Hybrid Neural Network Model With Multidomain Fusion. Hierarchical Parameterization for Seamless Transition Trajectory Generation. Fuzzy Adaptive Nonsingular Fixed-Time Attitude Tracking Control of Quadrotor UAVs. Simultaneous Interference Localization and Array Calibration for Robust Adaptive Beamforming With Partly Calibrated Arrays. Scheduling Space-to-Ground Optical Communication Under Cloud Cover Uncertainty. Predefined-Time Asymptotic Tracking Control for Hypersonic Flight Vehicles With Input Quantization and Faults. Fixed-Time Observer Based Safety Control for a Quadrotor UAV. Three-Dimensional Extended Object Tracking and Shape Learning Using Gaussian Processes. Explicit Nonlinear MPC for Fault Tolerance Using Interacting Multiple Models. Sensor Management for Search and Track Using the Poisson Multi-Bernoulli Mixture Filter. Fractional-Order Nonsingular Terminal Sliding Mode Tension Control for the Deployment of Space Tethered Satellite. Implementation of a Time-Sensitive Networking (TSN) Ethernet Bus for Microlaunchers. Passive Radar STAP Detection and DoA Estimation Under Antenna Calibration Errors. Reconfigurable Linear Antenna Arrays for Beam-Pattern Matching in Collocated MIMO Radars. Effect of Weighting Strategies on Taguchi-Based Optimization of the Four-Stage Constant Current Charge Pattern. Disturbance Observer Enhanced Neural Network LPV Control for a Blended-Wing-Body Large Aircraft. Performance Analysis of the Dispersion of Double Differences Algorithm to Detect Single-Source GNSS Spoofing. Quadrotor State Estimation With IMU and Delayed Real-Time Kinematic GPS. 2-D PBR Localization Complying With Constraints Forced by Active Radar Measurements. An Augmented $H_\infty$ Filter for Satellite Jitter Estimation Based on ASTER/SWIR and Blurred Star Images. A Reinforcement Learning Based Approach for Multitarget Detection in Massive MIMO Radar. Compressed Particle Methods for Expensive Models With Application in Astronomy and Remote Sensing.