Clarify the timing of PVT (in the context of TIM TP)

Author: PaulZC

examples/Basics/Example32_TIMTP/Example32_TIMTP.ino

@@ -1,14 +1,14 @@
 /*
   Displaying the TIM TP timing information for the _next_ TP time pulse
-  (PVT provides the time of the _previous_ pulse)
   By: Paul Clark
   SparkFun Electronics
   Date: March 24th, 2023
   License: MIT. See license file for more information.
 
   This example shows how to query a u-blox module for the TIM TP time-pulse-of-week.
   This contains the timing information for the _next_ time pulse. I.e. it is output
-  _ahead_ of time. PVT contains the time of the _previous_ pulse.
+  _ahead_ of time. PVT provides the time of the navigation solution which is usually
+  aligned with the _previous_ pulse.
 
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@@ -78,7 +78,8 @@ void loop()
   //      Then getPVT will poll NAV PVT, wait and return true when the NAV PVT data arrives.
   //      The TIM TP data will then be one second old.
   //      Because TIM TP provides the time of the _next_ time pulse and NAV PVT provides
-  //      the time of the _previous_ time pulse, the two Epochs should be the same!
+  //      the time of the navigation solution close to the _previous_ time pulse,
+  //      the two Epochs should be the same!
   if (myGNSS.getTIMTP() && myGNSS.getPVT())
   {
     // Read the time pulse of week as Unix Epoch
@@ -101,7 +102,7 @@ void loop()
     uint32_t epochPVT = myGNSS.getUnixEpoch(microsPVT); //Read the time of week as Unix Epoch
 
     Serial.print("NAV PVT as Epoch: ");
-    Serial.print(epochPVT); //Print the time of the previous pulse
+    Serial.print(epochPVT); //Print the time of the previous navigation solution
     Serial.print(".");
     if (microsPVT < 100000) Serial.print("0"); //Pad the zeros if needed
     if (microsPVT < 10000) Serial.print("0");

src/u-blox_structs.h

@@ -1922,7 +1922,8 @@ typedef struct
 
 // UBX-TIM-TP (0x0D 0x01): Time pulse time data
 // Contains the Time-Pulse-Of-Week for the _next_ time pulse
-// (PVT etc. provide the time of the _previous_ time pulse)
+// (PVT provides the time of the navigation solution which is usually
+// aligned with the _previous_ pulse)
 const uint16_t UBX_TIM_TP_LEN = 16;
 
 typedef struct