diff --git a/meshai/adapter_config/defaults.py b/meshai/adapter_config/defaults.py
index 3198729..1d8d6e4 100644
--- a/meshai/adapter_config/defaults.py
+++ b/meshai/adapter_config/defaults.py
@@ -630,6 +630,11 @@ REGISTRY: dict[tuple[str, str], dict[str, Any]] = {
         "type": "bool",
         "description": "Dry-run mode: log wire text at INFO with DRY-RUN prefix instead of dispatching. Default true so satpass re-enables inert.",
     },
+    ("satpass", "max_aos_horizon_hours"): {
+        "default": 24,
+        "type": "int",
+        "description": "Maximum hours ahead for AOS. Passes with AOS further in the future are rejected as stale predictions. 0 disables.",
+    },
 
     # =================================================================
     # DASHBOARD -- UI-only settings persisted for the operator
diff --git a/meshai/central/satpass_handler.py b/meshai/central/satpass_handler.py
index d17bc74..7558293 100644
--- a/meshai/central/satpass_handler.py
+++ b/meshai/central/satpass_handler.py
@@ -314,6 +314,14 @@ def handle_satpass(envelope: dict, subject: str,
                      los_epoch, now)
         return None
 
+    # AOS horizon guard: reject passes too far in the future (likely stale prediction)
+    max_horizon_h = float(getattr(cfg, "max_aos_horizon_hours", 24))
+    if max_horizon_h > 0 and aos_epoch > now + max_horizon_h * 3600:
+        logger.debug(
+            "satpass_handler: AOS %d is %.1fh away, beyond %gh horizon; skipping",
+            aos_epoch, (aos_epoch - now) / 3600, max_horizon_h)
+        return None
+
     # Observer filter (empty = all)
     observers = getattr(cfg, "observers", []) or []
     if observers and observer not in observers: