diff --git a/gcn/notices/core/DateTime.schema.json b/gcn/notices/core/DateTime.schema.json
index d816a8c..f0cb23e 100644
--- a/gcn/notices/core/DateTime.schema.json
+++ b/gcn/notices/core/DateTime.schema.json
@@ -15,6 +15,10 @@
       "maxItems": 2,
       "description": "Trigger time uncertainty [s, 1-sigma], with optional asymmetric uncertainty"
     },
+    "time_resolution": {
+      "type": "number",
+      "description": "Time resolution used for the source search [ms]"
+    },
     "observation_start": {
       "type": "string",
       "description": "Start time of the observation [ISO 8601]"
diff --git a/gcn/notices/core/DispersionMeasure.schema.json b/gcn/notices/core/DispersionMeasure.schema.json
new file mode 100644
index 0000000..2c33af2
--- /dev/null
+++ b/gcn/notices/core/DispersionMeasure.schema.json
@@ -0,0 +1,23 @@
+{
+  "$id": "https://gcn.nasa.gov/schema/main/gcn/notices/core/DispersionMeasure.schema.json",
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "type": "object",
+  "title": "Schema for Radio Transients Observables",
+  "description": "Dispersion Measure schema used for radio transients",
+  "properties": {
+    "dm": {
+      "type": "number",
+      "description": "Dispersion measure (DM) of the burst [pc/cm^3], representing the integrated column density of free electrons along the line of sight."
+    },
+    "dm_error": {
+      "type": "array",
+      "items": { "type": "number" },
+      "maxItems": 2,
+      "description": "Uncertainity associated with the dispersion measure [pc/cm^3, 1-sigma], with optional asymmetric uncertainty."
+    },
+    "dm_gal_ne_2001_max": {
+      "type": "number",
+      "description": "Estimated contribution to the dispersion measure [pc/cm^3], from the Galaxy using the NE2001 model."
+    }
+  }
+}
diff --git a/gcn/notices/core/Reporter.schema.json b/gcn/notices/core/Reporter.schema.json
index 296cbbd..e4fecba 100644
--- a/gcn/notices/core/Reporter.schema.json
+++ b/gcn/notices/core/Reporter.schema.json
@@ -27,6 +27,12 @@
       "type": "string",
       "default": "energy"
     },
+    "spectral_center": {
+      "enum": ["energy", "wavelength", "frequency"],
+      "description": "Central value of the observing band",
+      "type": "number",
+      "default": "energy"
+    },
     "units": {
       "enum": ["keV", "nm", "Hz"],
       "description": "Units of band range, if not parsed, then default energy is keV",
diff --git a/package-lock.json b/package-lock.json
index 6537cf2..93185fa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1926,9 +1926,9 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.4.2",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.4.2.tgz",
-      "integrity": "sha512-e9MewbtFo+Fevyuxn/4rrcDAaq0IYxPGLvObpQjiZBMAzB9IGmzlnG9RZy3FFas+eBMu2vA0CszMeduow5dIuQ==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.3.3.tgz",
+      "integrity": "sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==",
       "dev": true,
       "bin": {
         "prettier": "bin/prettier.cjs"