diff --git a/sbp.cabal b/sbp.cabal
--- a/sbp.cabal
+++ b/sbp.cabal
@@ -1,5 +1,5 @@
 name:                  sbp
-version:               2.1.2
+version:               2.1.3
 synopsis:              SwiftNav's SBP Library
 homepage:              https://github.com/swift-nav/libsbp
 license:               LGPL-3
diff --git a/src/SwiftNav/SBP/Gnss.hs b/src/SwiftNav/SBP/Gnss.hs
--- a/src/SwiftNav/SBP/Gnss.hs
+++ b/src/SwiftNav/SBP/Gnss.hs
@@ -30,8 +30,6 @@
 -- | GnssSignal16.
 --
 -- Signal identifier containing constellation, band, and satellite identifier
--- - 0 GPS L1CA        - 1 GPS L2CM        - 2 SBAS L1CA        - 3 GLO L1CA
--- - 4 GLO L2CA        - 5 GPS L1P        - 6 GPS L2P
 data GnssSignal16 = GnssSignal16
   { _gnssSignal16_sat :: Word8
     -- ^ Constellation-specific satellite identifier
@@ -105,11 +103,9 @@
 
 -- | GPSTimeNano.
 --
--- A wire-appropriate GPS time, defined as the number of milliseconds since
--- beginning of the week on the Saturday/Sunday A wire-appropriate receiver
--- clock time, defined as the time since the beginning of the week on the
--- Saturday/Sunday transition. In most cases, observations are epoch aligned
--- so ns field will be 0.
+-- A wire-appropriate receiver clock time, defined as the time since the
+-- beginning of the week on the Saturday/Sunday transition. In most cases,
+-- observations are epoch aligned so ns field will be 0.
 data GpsTimeNano = GpsTimeNano
   { _gpsTimeNano_tow :: Word32
     -- ^ Milliseconds since start of GPS week
@@ -139,7 +135,7 @@
 --
 -- Carrier phase measurement in cycles represented as a 40-bit fixed point
 -- number with Q32.8 layout, i.e. 32-bits of whole cycles and 8-bits of
--- fractional cycles.  This phase has the same sign as the pseudorange.
+-- fractional cycles. This phase has the same sign as the pseudorange.
 data CarrierPhase = CarrierPhase
   { _carrierPhase_i :: Int32
     -- ^ Carrier phase whole cycles
diff --git a/src/SwiftNav/SBP/Observation.hs b/src/SwiftNav/SBP/Observation.hs
--- a/src/SwiftNav/SBP/Observation.hs
+++ b/src/SwiftNav/SBP/Observation.hs
@@ -56,7 +56,7 @@
 --
 -- Doppler measurement in Hz represented as a 24-bit fixed point number with
 -- Q16.8 layout, i.e. 16-bits of whole doppler and 8-bits of fractional
--- doppler.  This doppler is defined as positive for approaching satellites.
+-- doppler. This doppler is defined as positive for approaching satellites.
 data Doppler = Doppler
   { _doppler_i :: Int16
     -- ^ Doppler whole Hz
@@ -94,9 +94,9 @@
   , _packedObsContent_lock :: Word8
     -- ^ Lock timer. This value gives an indication of the time for which a
     -- signal has maintained continuous phase lock. Whenever a signal has lost
-    -- and regained lock, this  value is reset to zero. It is encoded according
+    -- and regained lock, this value is reset to zero. It is encoded according
     -- to DF402 from the RTCM 10403.2 Amendment 2 specification.  Valid values
-    -- range  from 0 to 15 and the most significant nibble is reserved for
+    -- range from 0 to 15 and the most significant nibble is reserved for
     -- future use.
   , _packedObsContent_flags :: Word8
     -- ^ Measurement status flags. A bit field of flags providing the status of
@@ -139,15 +139,7 @@
 -- phase observation here is represented as a 40-bit fixed point number with
 -- Q32.8 layout (i.e. 32-bits of whole cycles and 8-bits of fractional cycles).
 -- The observations are be interoperable with 3rd party receivers and conform
--- with typical RTCMv3 GNSS observations.    The lock field represents the
--- range of time for  which a particular signal has maintained carrier phase
--- lock.  The minimum and maximum possible lock times  for each value of the
--- field can be described by the following piecewise function.   Given the lock
--- value, l, the minimum lock time is given by 2 ^ (l + 4) ms and the  maximum
--- lock time is given by 2 ^ (l + 5) ms provided n is not 0.   If n is 0 the
--- lower range is given to be 0 ms. Conversely, given a lock time  (t) in
--- milliseconds, the field value is given by floor(log_2(t) - 4)  when t is
--- greater than 32 ms or 0 if (t) is less than 32 ms.
+-- with typical RTCMv3 GNSS observations.
 data MsgObs = MsgObs
   { _msgObs_header :: ObservationHeader
     -- ^ Header of a GPS observation message