From f24e12817b1793c0534b90c19c6e130f79b3b359 Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Sun, 27 Sep 2026 20:48:23 -0700
Subject: [PATCH 1/2] Report the earliest and latest times in
 SpectrogramSequence.__str__

The time range used the first time of the first cube and the last time of the
last cube, so a sequence whose time runs backwards along an axis (for example
an IRIS v34 raster) printed its range with the start after the end.
---
 sunraster/spectrogram_sequence.py           |  7 ++++---
 sunraster/tests/test_spectrogramsequence.py | 13 +++++++++++++
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/sunraster/spectrogram_sequence.py b/sunraster/spectrogram_sequence.py
index 9a65700..68bdea0 100644
--- a/sunraster/spectrogram_sequence.py
+++ b/sunraster/spectrogram_sequence.py
@@ -168,9 +168,10 @@ def __str__(self):
                 )
         data0 = self.data[0]
         if data0._time_name:
-            start_time = data0.time if data0.time.isscalar else data0.time.squeeze()[0]
-            data_1 = self.data[-1]
-            stop_time = data_1.time if data_1.time.isscalar else data_1.time.squeeze()[-1]
+            # Time can run backwards along an axis (for example IRIS v34 rasters),
+            # so the first and last values are not always the start and end.
+            start_time = min(cube.time.min() for cube in self.data)
+            stop_time = max(cube.time.max() for cube in self.data)
             time_period = start_time if start_time == stop_time else Time([start_time.iso, stop_time.iso])
         else:
             time_period = None
diff --git a/sunraster/tests/test_spectrogramsequence.py b/sunraster/tests/test_spectrogramsequence.py
index 73d4825..aa395b6 100644
--- a/sunraster/tests/test_spectrogramsequence.py
+++ b/sunraster/tests/test_spectrogramsequence.py
@@ -322,3 +322,16 @@ def test_sns_instrument_axes_types(input_sequence, expected_sns_axes_types):
 
 def test_slice_as_raster():
     assert isinstance(sequence_DN[:, 0], SpectrogramSequence)
+
+
+def test_str_time_range_when_time_runs_backwards():
+    # IRIS v34 rasters step backwards in time, so the first time is the latest one.
+    times = Time("2017-01-01") + TimeDelta(np.arange(TIME_DIM_LEN * 2)[::-1], format="sec")
+    cubes = []
+    for i in range(2):
+        cube = SpectrogramCube(SOURCE_DATA_DN, WCS0, u.ct, SOURCE_UNCERTAINTY_DN, meta=meta_exposure0)
+        cube.extra_coords.add("time", 0, times[i * TIME_DIM_LEN : (i + 1) * TIME_DIM_LEN])
+        cubes.append(cube)
+    assert "Time Range: ['2017-01-01 00:00:00.000' '2017-01-01 00:00:03.000']" in str(
+        RasterSequence(cubes, meta=meta_seq, common_axis=0)
+    )

From 33bb8980a6d628f54da6f2cfeb622e6aa22c87cd Mon Sep 17 00:00:00 2001
From: Nabil Freij <nabil.freij@gmail.com>
Date: Sun, 27 Sep 2026 21:07:46 -0700
Subject: [PATCH 2/2] Add changelog entry for #331

---
 changelog/331.bugfix.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changelog/331.bugfix.rst

diff --git a/changelog/331.bugfix.rst b/changelog/331.bugfix.rst
new file mode 100644
index 0000000..21025eb
--- /dev/null
+++ b/changelog/331.bugfix.rst
@@ -0,0 +1 @@
+The time range printed for a `~sunraster.SpectrogramSequence` now runs from the earliest to the latest time, even when time runs backwards along an axis (for example IRIS v34 rasters); before, it could print the start after the end.