4. Download raw input products#

Find a RAW_0S product ID#

Go to the ESA MAAP Explorer, search for a Biomass Level 0 product over your area of interest, and copy the product ID. Example:

BIO_S1_RAW__0S_20251121T095253_20251121T095450_T_G01_M01_C01_T006_F062_01_DNG988

The product ID encodes useful information:

Field

Example

Meaning

Swath

S1

Swath identifier

Start time

20251121T095253

Acquisition start (UTC)

Stop time

20251121T095450

Acquisition stop (UTC)

Global cycle

G01

Global coverage ID

Major cycle

M01

Major cycle ID

Repeat cycle

C01

Repeat cycle (1 to 7)

Track

T006

Track number

Frame

F062

Frame number

Download the raw products#

You need 5 product types for a single acquisition: RAW_0S, RAW_0M, AUX_ORB, AUX_ATT, AUX_TEC. For the full Tomographic chain (STA + L2A), you need 7 repeat passes of the same track and frame, i.e. 35 products.

For a one-off run, the simplest path is to download each product manually from the MAAP Explorer search results. For the full Tomographic chain, search by track/frame and download all 7 cycles (C01 to C07).

Extract everything into a single Inputs/ folder:

mkdir -p ~/bps-work/data/run_001/Inputs
mv ~/Downloads/BIO_*.zip ~/bps-work/data/run_001/Inputs/
cd ~/bps-work/data/run_001/Inputs
for f in *.zip; do unzip -o "$f" && rm "$f"; done

scripts/BPS_inputs_download.py automates retrieval from a single RAW_0S product ID, using the ESA MAAP catalogue API (requires a free MAAP account).

Run from notebooks/1_BPS_downloads_raws_for_processing.ipynb. Edit cell 0 to set:

output_path = '/home/yourname/bps-work/data/run_001/'

Choose between single repeat cycle (5 products) or full major cycle (35 products, required for STA + L2A) via the matching helper function inside the notebook.

Expected layout after download#

For a full major cycle, the Inputs/ folder contains 7 copies of each product type, all sharing the same track and frame:

~/bps-work/data/run_001/Inputs/
├── BIO_AUX_ATT____...  (7 files, one per repeat cycle)
├── BIO_AUX_ORB____...  (7 files)
├── BIO_AUX_TEC____...  (7 files, one per acquisition day)
├── BIO_S1_RAW__0M_..._C01_...  ... _C07_... (7 files)
└── BIO_S1_RAW__0S_..._C01_T006_F062_... ... _C07_T006_F062_... (7 files)