fix typos

CLAUDE.md

@@ -14,7 +14,7 @@ Display should be whole screen. An escape, possibly with the escape key
 needs to be provided to exit the program and go back to shell.
 
 We have to simulate everything as we are not allowed to have an actual radar at
-out location because because we are not on the water.
+our location because we are not on the water.
 
 The proposed location of the radar antenna is at the dock of the Community
 boating center in Bellingham, Washington.
@@ -23,7 +23,7 @@ Location is 48.72° N Latitude and -122.51° W Longitude
 The proposed maximum range is 15 miles. 
 Selectable ranges should be 2, 5, 10, and 15 miles
 
-The project will be implemented on on a Geekom A8 Max
+The project will be implemented on a Geekom A8 Max
 with AMD AI chip R9-8945HS with 32 GB ram
 
 The communications for the SDR radios will be handled by
@@ -75,7 +75,7 @@ The following classes would be needed:
 2. Operator controls. These feed to control data input to the
    display class using appropriate mutexes. This would also
    include updating graticules for changing range on the PPI
-   scope and changing range and bearing for the a scope
+   scope and changing range and bearing for the A scope
 
 3. Radar targets from receivers AIS, ADS-B, and UAT
 
@@ -88,7 +88,7 @@ mutexes in order to send anything to the display. Perhaps they could
 be polled by a dispatcher that will tell each one its turn to send
 data to the display.
 The simulator will use ads-b and ais and uat received on airspy 
-SDR radios communicating with Raspberry pi 4 single board computers
+SDR radios communicating with Raspberry Pi 5 single board computers
 running linux.
 
 I plan to have a variety of phony targets simulated in addition to
@@ -96,7 +96,7 @@ those received on uat, ads-b, and ais.
 
 Note that directions shall be true, not magnetic
 
-Note that shoreline data is from noaa maps
+Note that shoreline data is from NOAA maps
 (NOAA provides free ENC (Electronic Nautical Chart) data in S-57 format covering   
   Bellingham Bay and surrounding waters.)
 
@@ -111,7 +111,7 @@ Major functions:
 6. PPI scope handling of the shoreline using some sort of topographical map
 7. PPI scope persistence phosphor
 8. Rain scatter
-9. wave scatter
+9. Wave scatter
 
 Display colors:
 1. A Scope is P1 (same as oscilloscope)
@@ -125,8 +125,7 @@ Display colors:
 Coordinates:
 
 Please note that all target information furnished to the 
-display be in local coordinates. Transition to local candidate
-from AIS/ADS-B/UAT need to be converted to local coordinates.
+display be in local coordinates. 
 Local coordinates have center (0,0) at location of radar
 base at the community boating center. Maximum coordinate size
 is 15 miles from the center.
@@ -187,15 +186,15 @@ Here are the controls that I am proposing
 
 1. Intensity
 2. Focus
-3. astigmatism
+3. Astigmatism
 4. Range selection (for both a scope and ppi scope) for maximum range.
    Changes range rings on ppi and changes graticule selection on A scope
 5. Sensitivity
 6. Sensitivity time control STC / sea clutter
 7. Bearing A scope:  which in the old days uses a servo motor to
    rotate the antenna. Feedback was with mechanical numbers. I am proposing
-   to use a small usb run digital display; Size should be no larger
-   than  1 by 3 inches. PPI Scope: This control can also be for the ppi curser.
+   to use a small USB digital display; Size should be no larger
+   than  1 by 3 inches. PPI Scope: This control can also be for the ppi cursor.
 8. Magnetron tune
 9. FTC / Rain Clutter
 10. Off-centering (two controls; one for each axis)
@@ -204,7 +203,6 @@ Here are the controls that I am proposing
 13. Pulse length selection (short pulse for better range resolution,
     long pulse for better sensitivity at distance; operator selectable)
 14. Pulse repetition frequency
-15. Range for selection of maximum range
 
 
 (Please suggest other controls I may have missed.)
@@ -212,7 +210,7 @@ Here are the controls that I am proposing
 Now, for controls, the tentative approach is to use encoders (that do not
 have end stops so they cannot be broken by visitors at the museum) I will
 need help on how to implement them. I am guessing a few Raspberry Pis to
-handle the encoders. I am thinking of encoders have one common terminal and
+handle the encoders. I am thinking of encoders that have one common terminal and
 a clockwise pulse terminal and a counter clockwise pulse terminal.
 
 Let's do this like this. The control handling will be a different class and run
@@ -235,7 +233,7 @@ TTF font file; render characters as textured quads in the shader.
 
 Communication:
 
-All I know now is that I plan to use a combination of raspberry pi 4 and a Airspy
+All I know now is that I plan to use a combination of Raspberry Pi 5 and an Airspy
 SDR for each of ais, ads-b, and uat. UAT (978 MHz) and ADS-B (1090 MHz) are different
 frequencies and require separate SDRs, but a single Raspberry Pi 5 is powerful enough
 to run both dump1090 (ADS-B) and dump978 (UAT) simultaneously with two SDRs on its USB
@@ -281,7 +279,7 @@ Order of testing features.
 2. Edge graticule on ppi scope (Bearing ticks and numbers)
 3. Replaceable graticule on A Scope. Have it  update for each different range
    and hold for 5 seconds for each range
-4. PPI scope range rings; both active display and persistance display - test
+4. PPI scope range rings; both active display and persistence display - test
    for each range settings; hold for 5 seconds each
 5. PPI scope cursor - test by slowly changing range and bearing
 6. PPI scope weather noise - test by changing noise level slowly