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updated downloader

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This commit is contained in:
straitz 2026-03-22 16:29:53 +09:00
parent ca95e06ab7
commit 8e9f117799
30 changed files with 1209 additions and 698 deletions
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14
internal/pkg/grib/util.go
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@ -6,25 +6,11 @@ import (
"time"
)
// Generate steps from 0 to 96 with step 3 hours (33 steps total)
// GFS provides 3-hourly data for 0-120 hours, we use first 96 hours (0, 3, 6, ..., 96)
var steps = func() []int {
result := make([]int, 0, 33)
for i := 0; i <= 96; i += 3 {
result = append(result, i)
}
return result
}()
func nearestRun(t time.Time) time.Time {
h := t.UTC().Hour() - t.UTC().Hour()%6
return time.Date(t.Year(), t.Month(), t.Day(), h, 0, 0, 0, time.UTC)
}
func fileName(run time.Time, step int) string {
return fmt.Sprintf("gfs.t%02dz.pgrb2.0p50.f%03d", run.Hour(), step)
}
func encodeKey(a ...any) uint64 {
h := fnv.New64a()
for _, v := range a {