json schema

stac-extensions · May 13, 2024 · 5353f3a · 5353f3a
1 parent cf09846
commit 5353f3a
Show file tree

Hide file tree

Showing 3 changed files with 42 additions and 23 deletions.
diff --git a/README.md b/README.md
@@ -21,15 +21,15 @@ It will often be combined with other extensions that describe the actual data, s
 
 ## Item Properties
 
-| Field Name                            | Type                    | Description                                                                                                                                                                                             |
-| ------------------------------------- | ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| sat:platform_international_designator | string                  | The International Designator, also known as COSPAR ID, and NSSDCA ID                                                                                                                                    |
-| sat:orbit_state                       | string                  | The state of the orbit. Either `ascending` or `descending` for polar orbiting satellites, or `geostationary` for geosynchronous satellites                                                              |
-| sat:absolute_orbit                    | integer                 | The absolute orbit number at the time of acquisition.                                                                                                                                                   |
-| sat:relative_orbit                    | integer                 | The relative orbit number at the time of acquisition.                                                                                                                                                   |
-| sat:anx_datetime                      | string                  | The [Ascending Node](https://en.wikipedia.org/wiki/Orbital_node) Crossing (ANX) time, in UTC. It is formatted according to [RFC 3339, section 5.6](https://tools.ietf.org/html/rfc3339#section-5.6).    |
-| sat:orbit_cycle                       | integer                 | The number of repeat cycle done by the satellite at the time of the acquisition. [Repeat cycle](https://ltb.itc.utwente.nl/page/498/concept/81577) is the time between two successive identical orbits. |
-| sat:orbit_state_vectors               | Map<string, double[][]> | The state vectors of the satellite at the time of acquisition.                                                                                                                                          |
+| Field Name                            | Type                  | Description                                                                                                                                                                                             |
+| ------------------------------------- | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| sat:platform_international_designator | string                | The International Designator, also known as COSPAR ID, and NSSDCA ID                                                                                                                                    |
+| sat:orbit_state                       | string                | The state of the orbit. Either `ascending` or `descending` for polar orbiting satellites, or `geostationary` for geosynchronous satellites                                                              |
+| sat:absolute_orbit                    | integer               | The absolute orbit number at the time of acquisition.                                                                                                                                                   |
+| sat:relative_orbit                    | integer               | The relative orbit number at the time of acquisition.                                                                                                                                                   |
+| sat:anx_datetime                      | string                | The [Ascending Node](https://en.wikipedia.org/wiki/Orbital_node) Crossing (ANX) time, in UTC. It is formatted according to [RFC 3339, section 5.6](https://tools.ietf.org/html/rfc3339#section-5.6).    |
+| sat:orbit_cycle                       | integer               | The number of repeat cycle done by the satellite at the time of the acquisition. [Repeat cycle](https://ltb.itc.utwente.nl/page/498/concept/81577) is the time between two successive identical orbits. |
+| sat:orbit_state_vectors               | Map<string, double[]> | The state vectors of the satellite at the time of acquisition.                                                                                                                                          |
 
 *At least one of the fields must be specified.*
 

diff --git a/examples/example-sentinel1.json b/examples/example-sentinel1.json
@@ -57,28 +57,28 @@
     "sat:orbit_cycle": 407,
     "sat:orbit_state_vectors": {
       "2015-03-05T05:19:40.103Z": [
-        5082939.4189831074,
-        1595651.7369050409,
-        4648033.5588545678,
-        5173.8779329387489,
+        5082939.418983107,
+        1595651.736905041,
+        4648033.558854568,
+        5173.877932938749,
         -269.5432365485845,
         -5550.246440359806
       ],
       "2015-03-05T05:19:45.449Z": [
-        5110519.0376543682,
+        5110519.037654368,
         1594174.328112772,
-        4618284.7202579351,
-        5143.1200754073143,
-        -283.12343661734587,
-        -5578.2160610647188
+        4618284.720257935,
+        5143.120075407314,
+        -283.1234366173459,
+        -5578.216061064719
       ],
       "2015-03-05T05:19:50.449Z": [
-        5136162.3887853986,
+        5136162.388785399,
         1592727.024757518,
-        4590328.5904560406,
-        5114.1961953273549,
-        -295.79384304587683,
-        -5604.2108611458289
+        4590328.590456041,
+        5114.196195327355,
+        -295.7938430458768,
+        -5604.210861145829
       ]
     },
     "sar:instrument_mode": "IW",

diff --git a/json-schema/schema.json b/json-schema/schema.json
@@ -51,6 +51,11 @@
                       "required": [
                         "sat:orbit_cycle"
                       ]
+                    },
+                    {
+                      "required": [
+                        "sat:orbit_state_vectors"
+                      ]
                     }
                   ]
                 },
@@ -149,6 +154,20 @@
         "sat:orbit_cycle": {
           "type": "integer",
           "minimum": 1
+        },
+        "sat:orbit_state_vectors": {
+          "type": "object",
+          "patternProperties": {
+            "^.*$": {
+              "type": "array",
+              "items": {
+                "type": "number"
+              },
+              "minItems": 6,
+              "maxItems": 9
+            }
+          },
+          "additionalProperties": false
         }
       },
       "patternProperties": {