Update CHANGELOG and docs

Author: duckontheweb

CHANGELOG.md

@@ -13,6 +13,7 @@
 - Timestamps Extension summaries ([#513](https://github.com/stac-utils/pystac/pull/513))
 - Define equality and `__repr__` of `RangeSummary` instances based on `to_dict`
   representation ([#513](https://github.com/stac-utils/pystac/pull/513))
+- Sat Extension summaries ([#509](https://github.com/stac-utils/pystac/pull/509))
 
 ### Changed
 
@@ -24,6 +25,8 @@
 - `Link` constructor classes (e.g. `Link.from_dict`, `Link.canonical`, etc.) now return
   the calling class instead of always returning the `Link` class
   ([#512](https://github.com/stac-utils/pystac/pull/512))
+- Sat extension now includes all fields defined in v1.0.0
+  ([#509](https://github.com/stac-utils/pystac/pull/509))
 
 ### Removed
 

docs/api.rst

@@ -499,6 +499,45 @@ RasterExtension
    :show-inheritance:
    :inherited-members:
 
+Satellite Extension
+-------------------
+
+OrbitState
+~~~~~~~~~~
+
+.. autoclass:: pystac.extensions.sat.OrbitState
+   :members:
+   :show-inheritance:
+   :undoc-members:
+
+SatExtension
+~~~~~~~~~~~~
+
+.. autoclass:: pystac.extensions.sat.SatExtension
+   :members:
+   :show-inheritance:
+
+ItemSatExtension
+~~~~~~~~~~~~
+
+.. autoclass:: pystac.extensions.sat.ItemSatExtension
+   :members:
+   :show-inheritance:
+
+AssetSatExtension
+~~~~~~~~~~~~
+
+.. autoclass:: pystac.extensions.sat.AssetSatExtension
+   :members:
+   :show-inheritance:
+
+SummariesSatExtension
+~~~~~~~~~~~~
+
+.. autoclass:: pystac.extensions.sat.SummariesSatExtension
+   :members:
+   :show-inheritance:
+
 Scientific Extension
 --------------------