Infrared and Laser Engineering, Volume. 52, Issue 10, 20230070(2023)
Research and application of picosecond accuracy time delay calibration for satellite laser ranging system
Figures & Tables(16)
Fig. 1. Composition and time delay distribution of satellite laser ranging system
Fig. 7. (a) Delay variation of the reference cable; (b) Delay variation after adding the the cable to be tested
Fig. 9. (a) Delay variation at point
Table 1. Material parameter of cable LMR-240
View tableView in ArticleTable 1. Material parameter of cable LMR-240
Item Material Unit/in (mm) Inner conductor Solid BC 0.056 (1.42) Dielectric Foam PE 0.150 (3.81) Outer conductor Aluminum tape 0.155 (3.94) Overall braid Tinned copper 0.178 (4.52)
Table 2. Electrical parameter of cable LMR-240
View tableView in ArticleTable 2. Electrical parameter of cable LMR-240
Performance property US (metric) Unit Velocity of propagation 84 % Dielectric constant 1.42 NA Time delay 1.21 (3.97) ns/ft (ns/m) Impedance 50 Ω·m Capacitance 24.2 (79.4) pF/ft (pF/m) Inductance 0.06 (0.2) µH/ft (µH/m) Shielding effectiveness >90 dB Inner conductor DC resistance 3.2 (10.5) Ohms/1000 ft (/km) Outer conductor DC resistance 3.89 (12.8) Ohms/1000 ft (/km) Voltage withstand 1500 V, DC Peak power 5.6 kW Operating temperature range −40/85 ℃
Table 3. Lens parameter
View tableView in ArticleTable 3. Lens parameter
Item Material Refractive index Optical length/mm Optical delay/ps Objective lens1 H-ZF2 1.680 30.22 169 Objective lens2 H-K9L 1.519 30.42 154 Wedge lens HH’ H-K9L 1.519 13.7 69
Table 4. Linear detector related parameters
View tableView in ArticleTable 4. Linear detector related parameters
Item Parameter Detection diode Linear photodiode on Si Active area 100 µm in diameter Output signals amplitude/V > +2.5 Operating temperature/℃ −50-+40
Table 5. Time delay measurement result
View tableView in ArticleTable 5. Time delay measurement result
No. Item Time delay/ps Note 1 Cable l3 (107100±2) LMR-240, 25 m 2 Linear detector outlet1 (211±7) Analog signal outlet 3 Linear detector outlet2 (13444±7) Square signal outlet 4 SMA-BNC Adapter (57±3) Box-box 5 Signal convertor 1 (1254±4) ITR-1, 50 Ω 6 Wedge lens (69±3) H-K9L, optical 13.7 mm 7 Objective lens1 (169±3) H-ZF2, thickness of center 30.22 mm 8 Objective lens2 (154±3) H-K9L , thickness of center 30.42 mm9 Optical path EH (8563±2) E-PD: 71 mm 10 Optical path HI (1967±3) 590 mm 11 Optical path IF (8442±2) Optical path without two objective lens 12 Optical path H’B (410±3) 123 mm 13 Transmission delay −4 698 - 14 Reception delay 192 269 - 15 Ground target to phase center (18 851±5) 2×IF+HI
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Haisheng Lin, Zhibo Wu, Min Zheng, Mingliang Long, Renfang Geng, Rongzong Yu, Zhongping Zhang. Research and application of picosecond accuracy time delay calibration for satellite laser ranging system[J]. Infrared and Laser Engineering, 2023, 52(10): 20230070
Paper Information
Category: Lasers & Laser optics
Received: Feb. 14, 2023
Accepted: --
Published Online: Nov. 21, 2023
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