SPS Flashcards
(35 cards)
What is the purpose of SPS
Provide the ship with a means of detecting, localizing, tracking and classifying UW threats using offboard sensors
Where is the antenna located
Aft side of the mast
Where do signals from the antenna get routed to
The receiver assembly
What is the range of SPS
4-5NM
What type of modulation does SPS use
FM
What does the receiver do to the signal it receives
Receives signal from sonobuoy, demodulates it, amplifies, then passes the signal to the Signal Processor
How many channels can the receiver assembly process simultaneously
4
Where does the receiver assembly output to
Signal processor for processing the signal, Digital Data Recorder for storage
How do operators listen to signals
1 of 4 channels goes into a headset
What is the signal processor’s purpose
Signal processing for detection, localization, tracking and classification of UW targets
Where is the sonobuoy processor
RR2
What power does the signal processor take
115V, 400Hz, 3 Phase
What does the signal processor provide to CMS
Track data, audio/video data via I/O processer #1 and the VSU(?)
What acts as HMI
MFWs
Processing slices
5x processing slices, 1 is the group controller that interfaces with the I/O 1 and the other 4 are identical processing slices which process 1 sonobuoy each or 2 LOFAR
What does the processing slice do to the signal
De-multiplexes, Automatic Gain Control, bandshifting, scaling and spectral analysis
How much time of processed data does each slice store
Up to 40min
What is the Digital Data Recorder
Magnetic tape system storing unprocessed acoustic data, up to 2 hours, can hold 4 channels simultaneously on a tape and voice annotations
What is the Remote Control Unit
Controls the Digital Data Recorder, provides replay options, ability to set replay speed and fast forward or rewind
What is the Test Signal Generator
RF synthesizer that generates mock sonobuoy signals for diagnostic/training purposes
What are the types of sonobuoys we can employ
LOFAR
DIFAR
BATHY
ANM
VLA
CODAR
DICASS
What is LOFAR
Low Frequency Analysis and Recording Buoy
Passive
Sonobuoy w omnidirectional hydrophones to receive acoustic signals
Determines range, minimum speed And CPA time
ANM
Ambient Sea Noise Measuring buoy, measures the sound pressure spectrum/noise levels across the frequency spectrum
DIFAR
Directional Frequency Analysis and Recording buoys
Passive
Uses directional hydrophones & an airborne processor
Detection & localization
Detection 2 to 2560 Hz at a range of 1-4 NM
Transit back to ship at a range of 2 to 4NM
Lifespan of 0.5, one, two, four or six hours
Depth modes of 30 or 120 or 300 m
