3 files changed, 67 insertions, 37 deletions
diff --git a/fg21sim/configs/00-general.conf.spec b/fg21sim/configs/00-general.conf.spec
index aa2a29a..ba432c5 100644
--- a/fg21sim/configs/00-general.conf.spec
+++ b/fg21sim/configs/00-general.conf.spec
@@ -7,19 +7,6 @@
 # behaviors, or will be used in other configuration sections.
 
 
-# Common/general configurations for the simulation
-[common]
-# HEALPix Nside value, i.e., pixel resolution
-# NOTE: also update "lmax" below.
-nside = integer(min=1, default=1024)
-
-# Range of multipole monents (l) of the angular power spectrum.
-# The power spectrum will be cut off to a constant for multipole l < lmin.
-# Generally, lmax = 3 * nside - 1
-lmin = integer(min=0, default=10)
-lmax = integer(min=1, default=3071)
-
-
 # Foreground components to be simulated
 [foregrounds]
 # Diffuse Galactic synchrotron emission (unpolarized)
@@ -39,6 +26,38 @@ extragalactic/clusters = boolean(default=True)
 extragalactic/pointsources = boolean(default=False)
 
 
+# Simulation sky/region configurations
+[sky]
+# Type of the input/output simulation sky
+# + patch:
+#       Input sky template is only a (square) patch of the sky.
+#       The simulated output maps have the same coverage/field as the
+#       input template, as well as the coordinate projection.
+# + healpix:
+#       Input sky template covers (almost) all sky, and stored in
+#       HEALPix format.  The simulated output maps will also be
+#       all-sky using the HEALPix projection.
+type = option("patch", "healpix", default="patch")
+
+  # Configurations for input sky patch
+  [[patch]]
+  # The (R.A., Dec.) coordinate of the input patch center [ deg ]
+  xcenter = float(default=0.0, min=0.0, max=360.0)
+  ycenter = float(default=0.0, min=-90.0, max=90.0)
+
+  # The (pixel) dimensions of the input patch
+  xsize = integer(default=None, min=1)
+  ysize = integer(default=None, min=1)
+
+  # Pixel size [ arcmin ]
+  pixelsize = float(default=None, min=0.0)
+
+  # Configurations for input HEALPix sky
+  [[healpix]]
+  # HEALPix Nside value, i.e., pixel resolution
+  nside = integer(min=1, default=1024)
+
+
 # Frequencies specification of the simulation products
 [frequency]
 # Unit of the frequency value
diff --git a/fg21sim/configs/10-galactic.conf.spec b/fg21sim/configs/10-galactic.conf.spec
index e565297..c01aed7 100644
--- a/fg21sim/configs/10-galactic.conf.spec
+++ b/fg21sim/configs/10-galactic.conf.spec
@@ -33,8 +33,15 @@
   # Spectral index map
   indexmap = string(default=None)
 
-  # Whether add fluctuations on the small scales
+  # Whether add fluctuations on the small scales according the angular
+  # power spectrum prediction?
   add_smallscales = boolean(default=True)
+  # Range of multipole moments (l) of the angular power spectrum.
+  # The power spectrum will be cut off to a constant for multipole l < lmin.
+  # NOTE: Update the ``lmax`` accordingly w.r.t. ``sky/healpix/nside``.
+  #       Generally, lmax = 3 * nside - 1
+  lmin = integer(min=0, default=10)
+  lmax = integer(min=1, default=3071)
 
   # Filename prefix for this component
   prefix = string(default="gsync")
diff --git a/fg21sim/configs/checkers.py b/fg21sim/configs/checkers.py
index 74d61e3..ffb1e63 100644
--- a/fg21sim/configs/checkers.py
+++ b/fg21sim/configs/checkers.py
@@ -50,29 +50,32 @@ def _is_power2(n):
     return (n and not (n & (n-1)))
 
 
-def check_common(configs):
-    """Check the "[common]" section of the configurations."""
+def check_foregrounds(configs):
+    """Check the "[foregrounds]" section of the configurations."""
     results = {}
-    # "common/nside" must be a power of 2
-    key = "common/nside"
-    res = _check_missing(configs, key)
-    if res == {}:
-        if not _is_power2(configs.getn(key)):
-            results[key] = "not a power of 2"
-    else:
-        results.update(res)
-    # "common/lmax" must be greater than "common/lmin"
-    key = "common/lmax"
-    res = _check_missing(configs, [key, "common/lmin"])
-    if res == {}:
-        if configs.getn(key) <= configs.getn("common/lmin"):
-            results[key] = "not greater than 'common/lmin'"
-    else:
-        results.update(res)
-    # Check enabled components
-    key = "common/components"
-    if len(configs.getn(key)) == 0:
-        results[key] = "no components enabled/selected"
+    # Check enabled foreground components
+    fg = configs.foregrounds
+    if len(fg[0]) == 0:
+        results["foregrounds"] = "no foreground components enabled"
+    return results
+
+
+def check_sky(configs):
+    """Check the "[sky]" section of the configurations."""
+    results = {}
+    skytype = configs.getn("sky/type")
+    if skytype == "patch":
+        sec = "sky/patch"
+    elif skytype == "healpix":
+        sec = "sky/healpix"
+        # "nside" must be a power of 2
+        key = sec + "/nside"
+        res = _check_missing(configs, key)
+        if res == {}:
+            if not _is_power2(configs.getn(key)):
+                results[key] = "not a power of 2"
+        else:
+            results.update(res)
     return results
 
 
@@ -181,7 +184,8 @@ def check_extragalactic_clusters(configs):
 
 # Available checkers to validate the configurations
 _CHECKERS = [
-    check_common,
+    check_foregrounds,
+    check_sky,
     check_frequency,
     check_output,
     check_galactic_synchrotron,