more docs improvements

docs/user_guide.md

@@ -7,28 +7,74 @@ general information about NCEPLIBS, the user is referred to the
 
 See the full documentation for each of the NCEPLIBS projects:
 
- - [NCEPLIBS-bacio](https://noaa-emc.github.io/NCEPLIBS-bacio/)
- - [NCEPLIBS-bufr](https://noaa-emc.github.io/NCEPLIBS-bufr/)
- - EMC-crtm
- - [NCEPLIBS-g2](https://noaa-emc.github.io/NCEPLIBS-g2/)
- - NCEPLIBS-g2tmpl
- - NCEPLIBS-gfsio
- - [NCEPLIBS-ip](https://noaa-emc.github.io/NCEPLIBS-ip/)
- - NCEPLIBS-landsfcutil
- - [NCEPLIBS-nemsio](https://noaa-emc.github.io/NCEPLIBS-nemsio/)
- - NCEPLIBS-nemsiogfs
- - EMC_post
- - [NCEPLIBS-sfcio](https://noaa-emc.github.io/NCEPLIBS-sfcio/)
- - [NCEPLIBS-sigio](https://noaa-emc.github.io/NCEPLIBS-sigio/)
- - [NCEPLIBS-sp](https://noaa-emc.github.io/NCEPLIBS-sp/)
- - NCEPLIBS-w3emc
- - NCEPLIBS-w3nco
- - NCEPLIBS-wrf_io
- - NCEPLIBS-ip2
- - [NCEPLIBS-wgrib2](https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/)
- - NCEPLIBS-g2c
- - [NCEPLIBS-grib_util](https://noaa-emc.github.io/NCEPLIBS-grib_util/)
- - [NCEPLIBS-prod_util](https://noaa-emc.github.io/NCEPLIBS-prod_util/)
- - UFS_UTILS
+- [NCEPLIBS-bacio](https://noaa-emc.github.io/NCEPLIBS-bacio/) This
+  library performs binary I/O for the NCEP models, processing
+  unformatted byte-addressable data records, and transforming the
+  little endian files and big endian files.
+
+- [NCEPLIBS-bufr](https://noaa-emc.github.io/NCEPLIBS-bufr/) Fortran
+  programs and command line utilites for working with the BUFR format.
+
+- EMC-crtm Community Radiative Transfer Model This is a snapshot of
+  the CRTM used within EMC applications.
+
+- [NCEPLIBS-g2](https://noaa-emc.github.io/NCEPLIBS-g2/)
+
+- NCEPLIBS-g2tmpl Utilities for GRIB2 templates.
+
+- NCEPLIBS-gfsio API to convert GFS Gaussian output into grib output.
+
+- [NCEPLIBS-ip](https://noaa-emc.github.io/NCEPLIBS-ip/) Fortran 90
+  subprograms to be used for interpolating between nearly all
+  (rectilinear) grids used at NCEP.
+
+- NCEPLIBS-landsfcutil Utility routines useful for initializing
+  land-surface states in NCEP models.
+
+- [NCEPLIBS-nemsio](https://noaa-emc.github.io/NCEPLIBS-nemsio/)
+  Performs I/O for the NCEP models using NEMS.
+
+- NCEPLIBS-nemsiogfs Performs I/O for the NEMS-GFS model.
+
+- EMC_post Post processing.
+
+- [NCEPLIBS-sfcio](https://noaa-emc.github.io/NCEPLIBS-sfcio/) API for
+  surface files I/O.
+
+- [NCEPLIBS-sigio](https://noaa-emc.github.io/NCEPLIBS-sigio/)
+  Application Program Interface for performing I/O on the sigma
+  restart file of the global spectral model.
+
+- [NCEPLIBS-sp](https://noaa-emc.github.io/NCEPLIBS-sp/) FORTRAN
+  subprograms to be used for a variety of spectral transform
+  functions.
+
+- NCEPLIBS-w3emc Fortran 90 decoder/encoder routines for GRIB edition
+  1.
+
+- NCEPLIBS-w3nco Fortran 90 decoder/encoder routines for GRIB edition
+  1.
+
+- [NCEPLIBS-wrf_io](https://noaa-emc.github.io/NCEPLIBS-wrf_io) This
+  is a lightweight WRF-IO API library for Unified Post Processor
+  (UPP).
+
+- NCEPLIBS-ip2 Fortran 90 subprograms to be used for interpolating
+  between nearly all grids used at NCEP.
+
+- [NCEPLIBS-wgrib2](https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/)
+  Provides functionality for interacting with, reading, writing, and
+  manipulating grib2 files, with a CMake build.
+
+- [NCEPLIBS-g2c](https://noaa-emc.github.io/NCEPLIBS-g2c/) C
+  decoder/encoder routines for GRIB edition 2
+
+- [NCEPLIBS-grib_util](https://noaa-emc.github.io/NCEPLIBS-grib_util/)
+  A collection of NCEP grib related utilities.
+
+- [NCEPLIBS-prod_util](https://noaa-emc.github.io/NCEPLIBS-prod_util/)
+  Product utilities for the NCEP models.
+
+- UFS_UTILS Utilities for the NCEP models.