diff --git a/inst/extdata/sources/config_source_deafrica.yml b/inst/extdata/sources/config_source_deafrica.yml
index 32e2597a..c6d15699 100644
--- a/inst/extdata/sources/config_source_deafrica.yml
+++ b/inst/extdata/sources/config_source_deafrica.yml
@@ -55,7 +55,7 @@ sources:
                         resolution    : 30
                         data_type     : "FLT4S"
                         missing_value : -32768
-                        minimum_value : 0
+                        minimum_value : -32767
                         maximum_value : 65534
                         scale_factor  : 1
                         offset_value  : 0
@@ -521,3 +521,259 @@ sources:
                 metadata_search : "tile"
                 ext_tolerance: 0
                 grid_system : "MGRS"
+
+            GM-LS8-LS9-ANNUAL :
+                bands:
+                    B02:  &deafrica_ls_gm_annual_30m
+                        band_name     : "SR_B2"
+                        resolution    : 30
+                        data_type     : "INT2U"
+                        missing_value : 0
+                        minimum_value : 1
+                        maximum_value : 65455
+                        scale_factor  : 0.0001
+                        offset_value  : 0
+                        resampling    : "bilinear"
+                    B03:
+                        <<: *deafrica_ls_gm_annual_30m
+                        band_name: "SR_B3"
+                    B04:
+                        <<: *deafrica_ls_gm_annual_30m
+                        band_name: "SR_B4"
+                    B05:
+                        <<: *deafrica_ls_gm_annual_30m
+                        band_name: "SR_B5"
+                    B06:
+                        <<: *deafrica_ls_gm_annual_30m
+                        band_name: "SR_B6"
+                    B07:
+                        <<: *deafrica_ls_gm_annual_30m
+                        band_name: "SR_B7"
+                    EMAD:  &deafrica_ls_gm_annual_metrics_30m
+                        band_name     : "EMAD"
+                        resolution    : 10
+                        data_type     : "FLT4S"
+                        missing_value : -3.402823466385288e+37
+                        minimum_value : -3.402823466385288e+37
+                        maximum_value : 1.7014118346015974e+37
+                        scale_factor  : 1
+                        offset_value  : 0
+                        resampling    : "bilinear"
+                    SMAD:
+                        <<: *deafrica_ls_gm_annual_metrics_30m
+                        band_name     : "SMAD"
+                    BCMAD:
+                        <<: *deafrica_ls_gm_annual_metrics_30m
+                        band_name: "BCMAD"
+                satellite: "LANDSAT"
+                sensor: "OLI"
+                collection_name: "gm_ls8_ls9_annual"
+                access_vars:
+                    AWS_DEFAULT_REGION: "af-south-1"
+                    AWS_S3_ENDPOINT: "s3.af-south-1.amazonaws.com"
+                    AWS_NO_SIGN_REQUEST: true
+                open_data: true
+                open_data_token: false
+                metadata_search: "tile"
+                ext_tolerance: 0
+                grid_system: "WRS-2"
+            GM-S2-ANNUAL      :
+                bands:
+                    B02:    &deafrica_sentinel_gm_annual_10m
+                        band_name      : "B02"
+                        resolution     : 10
+                        data_type      : "INT2U"
+                        missing_value  : 0
+                        minimum_value  : 1
+                        maximum_value  : 65455
+                        scale_factor   : 0.0001
+                        offset_value   : 0
+                        resampling     : "bilinear"
+                    B03:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B03"
+                    B04:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B04"
+                    B05:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B05"
+                    B06:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B06"
+                    B07:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B07"
+                    B08:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B08"
+                    B11:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B11"
+                    B12:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                    B8A:
+                        <<: *deafrica_sentinel_gm_annual_10m
+                        band_name: "B8A"
+                    EMAD:  &deafrica_sentinel_gm_annual_metrics_10m
+                        band_name     : "EMAD"
+                        resolution    : 10
+                        data_type     : "FLT4S"
+                        missing_value : -3.402823466385288e+37
+                        minimum_value : -3.402823466385288e+37
+                        maximum_value : 1.7014118346015974e+37
+                        scale_factor  : 1
+                        offset_value  : 0
+                        resampling    : "bilinear"
+                    SMAD:
+                        <<: *deafrica_sentinel_gm_annual_metrics_10m
+                        band_name     : "SMAD"
+                    BCMAD:
+                        <<: *deafrica_sentinel_gm_annual_metrics_10m
+                        band_name: "BCMAD"
+                satellite: "SENTINEL-2"
+                sensor: "MSI"
+                collection_name: "gm_s2_annual"
+                access_vars:
+                    AWS_DEFAULT_REGION: "af-south-1"
+                    AWS_S3_ENDPOINT: "s3.af-south-1.amazonaws.com"
+                    AWS_NO_SIGN_REQUEST: true
+                open_data: true
+                open_data_token: false
+                metadata_search: "tile"
+                ext_tolerance: 0
+                grid_system: "MGRS"
+            GM-S2-ROLLING             :
+                bands:
+                    B02:  &deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B02"
+                        resolution     : 10
+                        data_type      : "INT2U"
+                        missing_value  : 0
+                        minimum_value  : 1
+                        maximum_value  : 65534
+                        scale_factor   : 0.0001
+                        offset_value   : 0
+                        resampling     : "bilinear"
+                    B03:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B03"
+                    B04:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B04"
+                    B05:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B05"
+                    B06:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B06"
+                    B07:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B07"
+                    B08:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B08"
+                    B11:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B11"
+                    B12:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B12"
+                    B8A:
+                        <<: *deafrica_sentinel_gm_rolling_10m
+                        band_name      : "B8A"
+                    EMAD:  &deafrica_sentinel_gm_annual_metrics_10m
+                        band_name     : "EMAD"
+                        resolution    : 10
+                        data_type     : "FLT4S"
+                        missing_value : -3.402823466385288e+37
+                        minimum_value : -3.402823466385288e+37
+                        maximum_value : 1.7014118346015974e+37
+                        scale_factor  : 1
+                        offset_value  : 0
+                        resampling    : "bilinear"
+                    SMAD:
+                        <<: *deafrica_sentinel_gm_annual_metrics_10m
+                        band_name: "SMAD"
+                    BCMAD:
+                        <<: *deafrica_sentinel_gm_annual_metrics_10m
+                        band_name: "BCMAD"
+                satellite: "SENTINEL-2"
+                sensor: "MSI"
+                collection_name: "gm_s2_rolling"
+                access_vars:
+                    AWS_DEFAULT_REGION: "af-south-1"
+                    AWS_S3_ENDPOINT: "s3.af-south-1.amazonaws.com"
+                    AWS_NO_SIGN_REQUEST: true
+                open_data: true
+                open_data_token: false
+                metadata_search: "tile"
+                ext_tolerance: 0
+                grid_system: "MGRS"
+            GM-S2-SEMIANNUAL          :
+                bands:
+                    B02:  &deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B02"
+                        resolution     : 10
+                        data_type      : "INT2U"
+                        missing_value  : 0
+                        minimum_value  : 1
+                        maximum_value  : 65455
+                        scale_factor   : 0.0001
+                        offset_value   : 0
+                        resampling     : "bilinear"
+                    B03:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B03"
+                    B04:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B04"
+                    B05:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B05"
+                    B06:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B06"
+                    B07:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B07"
+                    B08:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B08"
+                    B11:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B11"
+                    B12:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B12"
+                    B8A:
+                        <<: *deafrica_sentinel_gm_semiannual_10m
+                        band_name      : "B8A"
+                    EMAD:  &deafrica_sentinel_gm_semiannual_metrics_10m
+                        band_name     : "EMAD"
+                        resolution    : 10
+                        data_type     : "FLT4S"
+                        missing_value : -3.402823466385288e+37
+                        minimum_value : -3.402823466385288e+37
+                        maximum_value : 1.7014118346015974e+37
+                        scale_factor  : 1
+                        offset_value  : 0
+                        resampling    : "bilinear"
+                    SMAD:
+                        <<: *deafrica_sentinel_gm_semiannual_metrics_10m
+                        band_name: "SMAD"
+                    BCMAD:
+                        <<: *deafrica_sentinel_gm_semiannual_metrics_10m
+                        band_name: "BCMAD"
+                satellite: "SENTINEL-2"
+                sensor: "MSI"
+                collection_name: "gm_s2_semiannual"
+                access_vars:
+                    AWS_DEFAULT_REGION: "af-south-1"
+                    AWS_S3_ENDPOINT: "s3.af-south-1.amazonaws.com"
+                    AWS_NO_SIGN_REQUEST: true
+                open_data: true
+                open_data_token: false
+                metadata_search: "tile"
+                ext_tolerance: 0
+                grid_system: "MGRS"
diff --git a/tests/testthat/test-cube-deafrica.R b/tests/testthat/test-cube-deafrica.R
index 024d46bd..05fe0bf4 100644
--- a/tests/testthat/test-cube-deafrica.R
+++ b/tests/testthat/test-cube-deafrica.R
@@ -299,6 +299,147 @@ test_that("Creating Sentinel-1 RTC cubes from DEA using tiles", {
     expect_true(all(c("VV") %in% sits_bands(cube_s1_reg)))
 })
 
+test_that("Creating Landsat-8/9 Geomedian (Annual) from DEA", {
+    landsat_cube <- .try(
+        {
+            sits_cube(
+                source = "DEAFRICA",
+                collection = "GM-LS8-LS9-ANNUAL",
+                bands = c("B05"),
+                roi   = c(
+                    lon_min = 33.546,
+                    lon_max = 34.999,
+                    lat_min = 1.427,
+                    lat_max = 3.726
+                ),
+                start_date = "2021-01-01",
+                end_date = "2022-01-01",
+                progress = FALSE
+            )
+        },
+        .default = NULL
+    )
+
+    testthat::skip_if(purrr::is_null(landsat_cube),
+                      message = "DEAFRICA is not accessible"
+    )
+
+    expect_true(all(sits_bands(landsat_cube) %in% c("B05")))
+    expect_equal(nrow(landsat_cube), 12)
+    bbox_cube <- sits_bbox(landsat_cube, as_crs = "EPSG:4326")
+    bbox_cube_1 <- sits_bbox(.tile(landsat_cube), as_crs = "EPSG:4326")
+    expect_true(bbox_cube["xmax"] >= bbox_cube_1["xmax"])
+    expect_true(bbox_cube["ymax"] >= bbox_cube_1["ymax"])
+    r_obj <- .raster_open_rast(landsat_cube$file_info[[1]]$path[1])
+    cube_nrows <- .tile_nrows(landsat_cube)
+    expect_true(.raster_nrows(r_obj) == cube_nrows)
+})
+test_that("Creating Sentinel-2 Geomedian (Annual) from DEA", {
+    sentinel_cube <- .try(
+        {
+            sits_cube(
+                source = "DEAFRICA",
+                collection = "GM-S2-ANNUAL",
+                bands = c("B05"),
+                roi   = c(
+                    lon_min = 33.546,
+                    lon_max = 34.999,
+                    lat_min = 1.427,
+                    lat_max = 3.726
+                ),
+                start_date = "2021-01-01",
+                end_date = "2022-01-01",
+                progress = FALSE
+            )
+        },
+        .default = NULL
+    )
+
+    testthat::skip_if(purrr::is_null(sentinel_cube),
+                      message = "DEAFRICA is not accessible"
+    )
+
+    expect_true(all(sits_bands(sentinel_cube) %in% c("B05")))
+    expect_equal(nrow(sentinel_cube), 12)
+    bbox_cube <- sits_bbox(sentinel_cube, as_crs = "EPSG:4326")
+    bbox_cube_1 <- sits_bbox(.tile(sentinel_cube), as_crs = "EPSG:4326")
+    expect_true(bbox_cube["xmax"] >= bbox_cube_1["xmax"])
+    expect_true(bbox_cube["ymax"] >= bbox_cube_1["ymax"])
+    r_obj <- .raster_open_rast(sentinel_cube$file_info[[1]]$path[1])
+    cube_nrows <- .tile_nrows(sentinel_cube)
+    expect_true(.raster_nrows(r_obj) == cube_nrows)
+})
+test_that("Creating Sentinel-2 Geomedian (Semiannual) from DEA", {
+    sentinel_cube <- .try(
+        {
+            sits_cube(
+                source = "DEAFRICA",
+                collection = "GM-S2-ANNUAL",
+                bands = c("B05"),
+                roi   = c(
+                    lon_min = 33.546,
+                    lon_max = 34.999,
+                    lat_min = 1.427,
+                    lat_max = 3.726
+                ),
+                start_date = "2021-01-01",
+                end_date = "2022-01-01",
+                progress = FALSE
+            )
+        },
+        .default = NULL
+    )
+
+    testthat::skip_if(purrr::is_null(sentinel_cube),
+                      message = "DEAFRICA is not accessible"
+    )
+
+    expect_true(all(sits_bands(sentinel_cube) %in% c("B05")))
+    expect_equal(nrow(sentinel_cube), 12)
+    bbox_cube <- sits_bbox(sentinel_cube, as_crs = "EPSG:4326")
+    bbox_cube_1 <- sits_bbox(.tile(sentinel_cube), as_crs = "EPSG:4326")
+    expect_true(bbox_cube["xmax"] >= bbox_cube_1["xmax"])
+    expect_true(bbox_cube["ymax"] >= bbox_cube_1["ymax"])
+    r_obj <- .raster_open_rast(sentinel_cube$file_info[[1]]$path[1])
+    cube_nrows <- .tile_nrows(sentinel_cube)
+    expect_true(.raster_nrows(r_obj) == cube_nrows)
+})
+test_that("Creating Sentinel-2 Geomedian (Rolling) from DEA", {
+    sentinel_cube <- .try(
+        {
+            sits_cube(
+                source = "DEAFRICA",
+                collection = "GM-S2-ROLLING",
+                bands = c("B05", "B8A"),
+                roi   = c(
+                    lon_min = 33.546,
+                    lon_max = 34.999,
+                    lat_min = 1.427,
+                    lat_max = 3.726
+                ),
+                start_date = "2021-01-01",
+                end_date = "2022-01-01",
+                progress = FALSE
+            )
+        },
+        .default = NULL
+    )
+
+    testthat::skip_if(purrr::is_null(sentinel_cube),
+                      message = "DEAFRICA is not accessible"
+    )
+
+    expect_true(all(sits_bands(sentinel_cube) %in% c("B05", "B8A")))
+    expect_equal(nrow(sentinel_cube), 12)
+    bbox_cube <- sits_bbox(sentinel_cube, as_crs = "EPSG:4326")
+    bbox_cube_1 <- sits_bbox(.tile(sentinel_cube), as_crs = "EPSG:4326")
+    expect_true(bbox_cube["xmax"] >= bbox_cube_1["xmax"])
+    expect_true(bbox_cube["ymax"] >= bbox_cube_1["ymax"])
+    r_obj <- .raster_open_rast(sentinel_cube$file_info[[1]]$path[1])
+    cube_nrows <- .tile_nrows(sentinel_cube)
+    expect_true(.raster_nrows(r_obj) == cube_nrows)
+})
+
 test_that("Creating ALOS-PALSAR-MOSAIC cubes from DEA", {
     cube_alos <- .try(
         {