Update parsers.ipynb

Author: kanhereashwin

notebooks/tutorials/parsers.ipynb

@@ -406,7 +406,7 @@
    "id": "fe8e8d6a",
    "metadata": {},
    "source": [
-    "## Rinex v3 Observation File Parsing"
+    "# Rinex Observation File Parsing"
    ]
   },
   {
@@ -417,8 +417,8 @@
     "Rinex is another file standard that is used in the GNSS community to store and transmit navigation information.\n",
     "Files with the extension `.yyo`, where `yy` is the year in which the measurement was made, are used to store and transmit\n",
     "measurements.\n",
-    "These measurements files can any constellation and each measurement usually contains the pseudorange, carrier phase (or difference from carrier frequency),\n",
-    "doppler, and signal-to-noise ration measurements.\n",
+    "These measurement files can contain any constellation and each measurement usually contains the pseudorange, carrier phase (or difference from carrier frequency),\n",
+    "doppler, and signal-to-noise ratio measurements.\n",
     "In the following lines, we show how to load a ``.o`` file into a NavData instance."
    ]
   },
@@ -430,7 +430,7 @@
    "outputs": [],
    "source": [
     "# download Rinex obs file and load it into NavData instance\n",
-    "!wget https://raw.githubusercontent.com/Stanford-NavLab/gnss_lib_py/ashwin/rinex-3-o/data/unit_test/rinex/obs/rinex_obs_mixed_types.20o --quiet -O \"rinex_obs_mixed_types.20o\"\n",
+    "!wget https://raw.githubusercontent.com/Stanford-NavLab/gnss_lib_py/main/data/unit_test/rinex/obs/rinex_obs_mixed_types.20o --quiet -O \"rinex_obs_mixed_types.20o\"\n",
     "rinex_obs_3 = glp.RinexObs(\"rinex_obs_mixed_types.20o\")\n",
     "print('Loaded Rinex Obs 3 data for the first time instant\\n', \\\n",
     "      rinex_obs_3.where('gps_millis', rinex_obs_3['gps_millis', 0], 'eq'))"