Fixed calculation of number of baselines for cases where num_antennas…

… is odd
MWATelescope · Apr 13, 2022 · 4922d82 · 4922d82
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 Changes in each release are listed below.
 
+## 0.13.1 13-Apr-2022 (Pre-release)
+* Fixed calculation of number of baselines for cases where num_antennas is odd.
+
 ## 0.13.0 04-Feb-2022 (Pre-release)
 * rfinput->digital_gains are now f64 and are divided by 64 (the value in the metafits is 64x larger to allow more flexible gains settings)
 * Modernised examples using clap 3.0 and reduced dependencies

diff --git a/src/metafits_context/mod.rs b/src/metafits_context/mod.rs
@@ -586,7 +586,7 @@ impl MetafitsContext {
 
         // `num_baselines` is the number of cross-correlations + the number of
         // auto-correlations.
-        let num_baselines = (num_antennas / 2) * (num_antennas + 1);
+        let num_baselines = (num_antennas * (num_antennas + 1)) / 2;
 
         // The FREQCENT value in the metafits is in units of kHz - make it Hz.
         let centre_freq_hz: u32 = {