diff --git a/v1.1.0/schema.json b/v1.1.0/schema.json
new file mode 100644
index 0000000..0d86067
--- /dev/null
+++ b/v1.1.0/schema.json
@@ -0,0 +1,166 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://stac-extensions.github.io/sat/v1.1.0/schema.json",
+  "title": "Satellite Extension",
+  "description": "STAC Sat Extension to a STAC Item.",
+  "type": "object",
+  "required": [
+    "stac_extensions"
+  ],
+  "properties": {
+    "stac_extensions": {
+      "type": "array",
+      "contains": {
+        "const": "https://stac-extensions.github.io/sat/v1.1.0/schema.json"
+      }
+    }
+  },
+  "oneOf": [
+    {
+      "$comment": "This is the schema for STAC Items.",
+      "type": "object",
+      "required": [
+        "type",
+        "properties",
+        "assets"
+      ],
+      "properties": {
+        "type": {
+          "const": "Feature"
+        },
+        "properties": {
+          "allOf": [
+            {
+              "anyOf": [
+                {
+                  "required": [
+                    "sat:platform_international_designator"
+                  ]
+                },
+                {
+                  "required": [
+                    "sat:orbit_state"
+                  ]
+                },
+                {
+                  "required": [
+                    "sat:absolute_orbit"
+                  ]
+                },
+                {
+                  "required": [
+                    "sat:relative_orbit"
+                  ]
+                },
+                {
+                  "required": [
+                    "sat:anx_datetime"
+                  ]
+                },
+                {
+                  "required": [
+                    "sat:orbit_cycle"
+                  ]
+                },
+                {
+                  "required": [
+                    "sat:orbit_state_vectors"
+                  ]
+                }
+              ]
+            },
+            {
+              "$ref": "#/definitions/fields"
+            }
+          ]
+        },
+        "assets": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/fields"
+          }
+        }
+      }
+    },
+    {
+      "$comment": "This is the schema for STAC Collections.",
+      "type": "object",
+      "required": [
+        "type"
+      ],
+      "properties": {
+        "type": {
+          "const": "Collection"
+        },
+        "assets": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/fields"
+          }
+        },
+        "item_assets": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/fields"
+          }
+        }
+      }
+    }
+  ],
+  "definitions": {
+    "fields": {
+      "type": "object",
+      "properties": {
+        "sat:platform_international_designator": {
+          "type": "string"
+        },
+        "sat:orbit_state": {
+          "title": "Orbit State",
+          "type": "string",
+          "enum": [
+            "ascending",
+            "descending",
+            "geostationary"
+          ]
+        },
+        "sat:absolute_orbit": {
+          "type": "integer",
+          "minimum": 1
+        },
+        "sat:relative_orbit": {
+          "type": "integer",
+          "minimum": 1
+        },
+        "sat:anx_datetime": {
+          "type": "string",
+          "format": "date-time"
+        },
+        "sat:orbit_cycle": {
+          "type": "integer",
+          "minimum": 1
+        },
+        "sat:orbit_state_vectors": {
+          "type": "object",
+          "$comment": "The key is a date-time string, and the value is an array of numbers.",
+          "patternProperties": {
+            "^(\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d\\.\\d+([+-][0-2]\\d:[0-5]\\d|Z))|(\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d([+-][0-2]\\d:[0-5]\\d|Z))|(\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d([+-][0-2]\\d:[0-5]\\d|Z))$": {
+              "type": "array",
+              "items": {
+                "type": "number"
+              },
+              "minItems": 6,
+              "maxItems": 9
+            }
+          },
+          "additionalProperties": false
+        }
+      },
+      "patternProperties": {
+        "^(?!sat:)": {
+          "$comment": "Do not allow unspecified fields prefixed with sat:"
+        }
+      },
+      "additionalProperties": false
+    }
+  }
+}
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