Fix for base module t0

src/hardware.jl

@@ -299,7 +299,7 @@ function Detector(io::IO)
             push!(pmts, PMT(pmt_id, Position(x, y, z), Direction(dx, dy, dz), t0, pmt_status))
         end
 
-        if ismissing(t₀) || t₀ == 0.0
+        if (ismissing(t₀) || t₀ == 0.0) && floor > 0
             # t₀ is only available in DETX v4+ and even with supported versions, the value is
             # sometimes 0 when e.g. the DETX was converted with Jpp from a version which did
             # not include that informatino (v3 and below). Here, we are using the averaged
@@ -307,6 +307,10 @@ function Detector(io::IO)
             t₀ = mean([pmt.t₀ for pmt in pmts])
         end
 
+        if ismissing(t₀) && floor == 0
+            t₀ = 0.0
+        end
+
         if ismissing(pos)
             # Similar to the module t₀, the module position was introduced in DETX v4.
             # If this is missing, it will be set to the averaged PMT positions. If it's

test/hardware.jl

@@ -27,6 +27,7 @@ const SAMPLES_DIR = joinpath(@__DIR__, "samples")
                 @test 361 == length(mods)
                 @test 106.95 ≈ d.modules[808469291].pos.y  # base module
                 @test 97.3720395 ≈ d.modules[808974928].pos.z  # base module
+                @test 0.0 == d.modules[808469291].t₀  # base module
             end
 
             @test 116.600 ≈ d.modules[808992603].pos.x atol=1e-5  # optical module