Check LP DAAC MODIS and VIIRS collections on Earthdata Cloud OPeNDAP

Source: R/mf_list_collections_cloud.R

CMR is paginated to discover every LPCLOUD collection supported by modisfast. For each collection, the function tests up to `n_granules` granules (newest first), including a single pixel data request. A successful sample does not imply that every granule or date is available.

mf_list_collections_cloud(
  collections = NULL,
  time_range = NULL,
  n_granules = 2L,
  verbose = "inform"
)

Arguments

collections

Optional character vector of collection names, for example `c("MOD11A1.061", "VNP43MA4.002")`. By default check LP DAAC MODIS collections from the modisfast catalogue and tiled VIIRS `.002` collections published by LPCLOUD in CMR.

time_range

Optional one or two Dates restricting sampled granules.

n_granules

Number of granules to check per collection (default 2).

verbose

Character string: `"quiet"`, `"inform"` (default), or `"debug"`. Controls progress messages.

Value

A data.frame with collection, collection_id, status, tested, succeeded, checked_at, and detail. Status is `operational` when all sampled granules served one pixel, `partial` when only some did, `unavailable` when none did, and `no_granules` when CMR found none for the chosen dates. `unverified` means no suitable two-dimensional variable was found. These statuses apply only to the granules sampled at `checked_at`.

Examples

if (FALSE) { # \dontrun{
Sys.setenv(EARTHDATA_TOKEN = "your Earthdata bearer token")
status <- mf_list_collections_cloud("VJ121A2.002")
subset(status, status == "operational")
mf_list_collections_cloud("VJ121A2.002",
  time_range = as.Date(c("2026-01-01", "2026-01-30")))
} # }