diff --git a/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/GeneralOps.kt b/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/GeneralOps.kt
index 011f82c356..c11f65f251 100644
--- a/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/GeneralOps.kt
+++ b/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/GeneralOps.kt
@@ -37,6 +37,14 @@ interface GeneralOps<V: IntervalLike<V>, T: GeneralOps<V, T>>: Timeline<V, T> {
   fun mapIntervals(boundsTransformer: BoundsTransformer, truncate: Boolean, f: (V) -> Interval) = map(boundsTransformer, truncate) { v -> v.changeInterval(f(v)) }
 
   fun filter(f: (V) -> Boolean) = BaseTimeline(ctor) { bounds -> collect(bounds).filter(f) }.specialize()
+  
+  fun filterByDuration(min: Duration = Duration.MIN_VALUE, max: Duration = Duration.MAX_VALUE) =
+      filter { v ->
+        val duration = v.interval.duration()
+        duration.longerThan(min) && duration.shorterThan(max)
+      }
+  fun filterShorterThan(dur: Duration) = filter { v -> v.interval.duration().shorterThan(dur) }
+  fun filterLongerThan(dur: Duration) = filter { v -> v.interval.duration().longerThan(dur) }
 
   fun shiftBy(dur: Duration) = map(BoundsTransformer.shift(dur), false) { v -> v.changeInterval(v.interval.shiftBy(dur)) }
 
diff --git a/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/SerialBooleanOps.kt b/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/SerialBooleanOps.kt
index 067698a225..7f1a7fa028 100644
--- a/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/SerialBooleanOps.kt
+++ b/timeline/src/main/kotlin/gov/nasa/jpl/aerie/timeline/ops/SerialBooleanOps.kt
@@ -38,4 +38,17 @@ interface SerialBooleanOps<P: GeneralOps<Segment<Boolean>, P>>: SerialOps<Boolea
         if (t.value) t.interval.shiftBy(shiftRising, shiftFalling)
         else t.interval.shiftBy(shiftFalling, shiftRising)
       }
+
+  fun falsifyByDuration(min: Duration = Duration.MIN_VALUE, max: Duration = Duration.MAX_VALUE) =
+      mapValues { s ->
+        if (s.value) {
+          val duration = s.interval.duration()
+          duration.longerThan(min) && duration.shorterThan(max)
+        } else {
+          false
+        }
+      }
+
+  fun falsifyShorterThan(dur: Duration) = falsifyByDuration(min = dur)
+  fun falsifyLongerThan(dur: Duration) = falsifyByDuration(max = dur)
 }