diff --git a/ingest/defaults/config.yaml b/ingest/defaults/config.yaml
index 0d3b1aa..57e554b 100644
--- a/ingest/defaults/config.yaml
+++ b/ingest/defaults/config.yaml
@@ -45,7 +45,7 @@ curate:
     Geographic Location: location
     Isolate Collection date: date
     Host Name: host
-    Submitter Names: authors
+    Submitter Names: full_authors
     Submitter Affiliation: institution
     SRA Accessions: sra_accession
 
@@ -93,13 +93,13 @@ curate:
     fields: ["region", "country", "division", "location"]
 
   # Metadata field that contains the list of authors associated with the sequence
-  authors_field: "authors"
+  authors_field: "full_authors"
 
   # Default value to use if the authors field is empty
   authors_default_value: "?"
 
   # Name to use for the generated abbreviated authors field
-  abbr_authors_field: "abbr_authors"
+  abbr_authors_field: "authors"
 
   # The ID field in the metadata to use to merge the manual annotations
   annotations_id: "strain"
@@ -119,6 +119,6 @@ curate:
     - country
     - host
     - sra_accession
-    - abbr_authors
+    - full_authors
     - authors
     - institution
diff --git a/ingest/rules/curate.smk b/ingest/rules/curate.smk
index cb8649c..3d7439e 100644
--- a/ingest/rules/curate.smk
+++ b/ingest/rules/curate.smk
@@ -134,8 +134,9 @@ rule subset_metadata:
         metadata_fields=",".join(config["curate"]["metadata_columns"]),
     shell:
         r"""
-        tsv-select -H -f {params.metadata_fields:q} \
-            {input.metadata:q} \
+        csv2tsv --csv-delim $'\t' {input.metadata:q} \
+          | tsv-select -H -f {params.metadata_fields:q} \
+          | csvtk fix-quotes --tabs \
           > {output.subset_metadata:q} \
          2> {log:q}
         """
diff --git a/phylogenetic/Snakefile b/phylogenetic/Snakefile
index c4909ba..0930239 100644
--- a/phylogenetic/Snakefile
+++ b/phylogenetic/Snakefile
@@ -4,7 +4,8 @@ configfile: "defaults/config.yaml"
 
 rule all:
     input:
-        expand("auspice/seasonal-cov_{virus}.json", virus=config["viruses"]),
+        auspice_json=expand("auspice/seasonal-cov_{virus}.json", virus=config["viruses"]),
+        tip_frequencies_json=expand("auspice/seasonal-cov_{virus}_tip-frequencies.json", virus=config["viruses"]),
 
 
 include: "rules/prepare_sequences.smk"
diff --git a/phylogenetic/defaults/auspice_config.json b/phylogenetic/defaults/auspice_config.json
index 6d933c5..970340c 100644
--- a/phylogenetic/defaults/auspice_config.json
+++ b/phylogenetic/defaults/auspice_config.json
@@ -12,19 +12,24 @@
   ],
   "build_url": "https://github.com/nextstrain/seasonal-cov",
   "colorings": [
-     {
+    {
       "key": "gt",
       "title": "Genotype",
       "type": "categorical"
     },
+    {
+      "key": "region",
+      "title": "Region",
+      "type": "categorical"
+    },
     {
       "key": "country",
       "title": "Country",
       "type": "categorical"
     },
     {
-      "key": "region",
-      "title": "Region",
+      "key": "author",
+      "title": "Author",
       "type": "categorical"
     }
   ],
@@ -38,11 +43,16 @@
   },
   "filters": [
     "country",
-    "region"
+    "region",
+    "author"
   ],
   "panels": [
     "tree",
     "map",
-    "entropy"
+    "entropy",
+    "frequencies"
+  ],
+  "metadata_columns": [
+    "author"
   ]
 }
diff --git a/phylogenetic/defaults/config.yaml b/phylogenetic/defaults/config.yaml
index 4e0b6b7..3b210f0 100644
--- a/phylogenetic/defaults/config.yaml
+++ b/phylogenetic/defaults/config.yaml
@@ -7,6 +7,13 @@ viruses:
   - "oc43"
   - "hku1"
 
+strain_id_field: "strain"
+
+tip_frequencies:
+  min_date: "2017-01-01"
+  max_date: "6M"
+  narrow_bandwidth: 0.2
+  wide_bandwidth: 0.6
 # virus-specific information
 # For each virus, provide the following parameter values. All paths
 # should be relative to the phylogenetic directory.
@@ -38,8 +45,8 @@ viruses:
     subsample_max_sequences: 4000
     min_length: 20000
   construct_phylogeny:
-    clock_rate: ""
-    clock_std_dev: ""
+    clock_rate: 0.000250
+    clock_std_dev: 0.00010
     coalescent: "opt"
     date_inference: "marginal"
     clock_filter_iqd: 4
@@ -68,8 +75,8 @@ oc43:
     subsample_max_sequences: 4000
     min_length: 20000
   construct_phylogeny:
-    clock_rate: ""
-    clock_std_dev: ""
+    clock_rate: 0.000250
+    clock_std_dev: 0.00010
     coalescent: "opt"
     date_inference: "marginal"
     clock_filter_iqd: 4
diff --git a/phylogenetic/defaults/hku1/dropped_strains.txt b/phylogenetic/defaults/hku1/dropped_strains.txt
index e69de29..e288f2a 100644
--- a/phylogenetic/defaults/hku1/dropped_strains.txt
+++ b/phylogenetic/defaults/hku1/dropped_strains.txt
@@ -0,0 +1,41 @@
+ON136168.1 # Chow et al - excluding these strains improves rooting of the tree
+ON136169.1 # Chow et al - excluding these strains improves rooting of the tree
+ON136170.1 # Chow et al - excluding these strains improves rooting of the tree
+ON136171.1 # Chow et al - excluding these strains improves rooting of the tree
+ON136172.1 # Chow et al - excluding these strains improves rooting of the tree
+ON136173.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461755.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461756.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461757.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461758.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461759.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461760.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461761.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461762.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461763.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461764.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461765.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461766.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461768.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461769.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461770.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461771.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461772.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461773.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461774.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461775.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461776.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461777.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461778.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461779.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461780.1 # Chow et al - excluding these strains improves rooting of the tree
+ON461781.1 # Chow et al - excluding these strains improves rooting of the tree
+
+# exclude sequences with >6000Ns and/or <80% coverage
+OY757708.1 # 27.8k Ns, 8.3% coverage
+OY757859.1 # 26.6k Ns, 10.7% coverage
+KF430196.1 # 8446 Ns, 70.4% coverage
+KF850450.2 # 8105 Ns, 71.7% coverage
+ON461767.1 # 7302 Ns, 75.0% coverage
+OY757702.1 # 6770 Ns, 77.3% coverage
+MW587043.1 # 6072 Ns, 78.9% coverage
diff --git a/phylogenetic/defaults/nl63/dropped_strains.txt b/phylogenetic/defaults/nl63/dropped_strains.txt
index e69de29..059b89f 100644
--- a/phylogenetic/defaults/nl63/dropped_strains.txt
+++ b/phylogenetic/defaults/nl63/dropped_strains.txt
@@ -0,0 +1,2 @@
+PQ037243.1
+PQ037240.1
diff --git a/phylogenetic/rules/construct_phylogeny.smk b/phylogenetic/rules/construct_phylogeny.smk
index fba9328..da004f6 100644
--- a/phylogenetic/rules/construct_phylogeny.smk
+++ b/phylogenetic/rules/construct_phylogeny.smk
@@ -45,31 +45,19 @@ rule refine:
         date_inference=lambda wildcards: config[wildcards.virus]["construct_phylogeny"]["date_inference"],
         clock_filter_iqd=lambda wildcards: config[wildcards.virus]["construct_phylogeny"]["clock_filter_iqd"],
     shell:
-        # TODO move this conditional logic up into the params lambda (?)
         r"""
-        (
-          if [ "{wildcards.virus}" == "229e" ] || [ "{wildcards.virus}" == "oc43" ]; then
-              echo "Estimating clock rate for {wildcards.virus}"
-              clock_rate=""
-              clock_std_dev=""
-          else
-              echo "Setting clock rate at {params.clock_rate} with std dev {params.clock_std_dev} for {wildcards.virus}"
-              clock_rate="--clock-rate {params.clock_rate}"
-              clock_std_dev="--clock-std-dev {params.clock_std_dev}"
-          fi
-
-          augur refine \
-              --tree {input.tree:q} \
-              --alignment {input.alignment:q} \
-              --metadata {input.metadata:q} \
-              --output-tree {output.tree:q} \
-              --output-node-data {output.node_data:q} \
-              --timetree \
-              $clock_rate \
-              $clock_std_dev \
-              --coalescent {params.coalescent:q} \
-              --date-confidence \
-              --date-inference {params.date_inference:q} \
-              --clock-filter-iqd {params.clock_filter_iqd:q}
-        ) 2>{log:q}
+        augur refine \
+            --tree {input.tree:q} \
+            --alignment {input.alignment:q} \
+            --metadata {input.metadata:q} \
+            --output-tree {output.tree:q} \
+            --output-node-data {output.node_data:q} \
+            --timetree \
+            --clock-rate {params.clock_rate} \
+            --clock-std-dev {params.clock_std_dev} \
+            --coalescent {params.coalescent:q} \
+            --date-confidence \
+            --date-inference {params.date_inference:q} \
+            --clock-filter-iqd {params.clock_filter_iqd:q} \
+          &> {log:q}
         """
diff --git a/phylogenetic/rules/export.smk b/phylogenetic/rules/export.smk
index 8b29266..8cde332 100644
--- a/phylogenetic/rules/export.smk
+++ b/phylogenetic/rules/export.smk
@@ -37,3 +37,32 @@ rule export:
           --output {output.auspice_json:q} \
         2>{log:q}
         """
+
+rule tip_frequencies:
+    """
+    Estimating KDE frequencies for tips
+    """
+    input:
+        tree = "results/{virus}/tree.nwk",
+        metadata = "data/{virus}/metadata.tsv",
+    output:
+        tip_freq = "auspice/seasonal-cov_{virus}_tip-frequencies.json"
+    params:
+        strain_id = config["strain_id_field"],
+        min_date = config["tip_frequencies"]["min_date"],
+        max_date = config["tip_frequencies"]["max_date"],
+        narrow_bandwidth =config["tip_frequencies"]["narrow_bandwidth"],
+        wide_bandwidth = config["tip_frequencies"]["wide_bandwidth"],
+    shell:
+        r"""
+        augur frequencies \
+            --method kde \
+            --tree {input.tree} \
+            --metadata {input.metadata} \
+            --metadata-id-columns {params.strain_id} \
+            --min-date {params.min_date} \
+            --max-date {params.max_date} \
+            --narrow-bandwidth {params.narrow_bandwidth} \
+            --wide-bandwidth {params.wide_bandwidth} \
+            --output {output.tip_freq}
+        """