Deonar

T1 methane evidence

Last updated 3 Oct 2026, 04:27 pm IST

102 clear passes · 7 flags · T1 1 · T2 0 · T3 6

Scene score of every pass

0.000.250.500.751.00Jul 2024Jan 2025Jul 2025Jan 2026Jul 2026threshold 0.79312 March 2024 · 0.60117 March 2024 · 0.52922 March 2024 · 0.29827 March 2024 · 0.3326 April 2024 · 0.62311 April 2024 · 0.50416 April 2024 · 0.52221 April 2024 · 0.32626 April 2024 · 0.3391 May 2024 · 0.4816 May 2024 · 0.46211 May 2024 · 0.56116 May 2024 · 0.58021 May 2024 · 0.29013 October 2024 · 0.47028 October 2024 · 0.4232 November 2024 · 0.7317 November 2024 · 0.77112 November 2024 · 0.60417 November 2024 · 0.36122 November 2024 · 0.57627 November 2024 · 0.78312 December 2024 · 0.66417 December 2024 · 0.73827 December 2024 · 0.4691 January 2025 · 0.59911 January 2025 · 0.41016 January 2025 · 0.34321 January 2025 · 0.42326 January 2025 · 0.80731 January 2025 · 0.7015 February 2025 · 0.61010 February 2025 · 0.30715 February 2025 · 0.55720 February 2025 · 0.7447 March 2025 · 0.77212 March 2025 · 0.76814 March 2025 · 0.84217 March 2025 · 0.62527 March 2025 · 0.3763 April 2025 · 0.6916 April 2025 · 0.74911 April 2025 · 0.63316 April 2025 · 0.53321 April 2025 · 0.55626 April 2025 · 0.3451 May 2025 · 0.44611 May 2025 · 0.47713 May 2025 · 0.5218 October 2025 · 0.44013 October 2025 · 0.47418 October 2025 · 0.52920 October 2025 · 0.52523 October 2025 · 0.3897 November 2025 · 0.2859 November 2025 · 0.36912 November 2025 · 0.34417 November 2025 · 0.61222 November 2025 · 0.64027 November 2025 · 0.45612 December 2025 · 0.43617 December 2025 · 0.47619 December 2025 · 0.42527 December 2025 · 0.3591 January 2026 · 0.7106 January 2026 · 0.7468 January 2026 · 0.69311 January 2026 · 0.61221 January 2026 · 0.28326 January 2026 · 0.50831 January 2026 · 0.2675 February 2026 · 0.49910 February 2026 · 0.67615 February 2026 · 0.43325 February 2026 · 0.6902 March 2026 · 0.6007 March 2026 · 0.3859 March 2026 · 0.33812 March 2026 · 0.62317 March 2026 · 0.35219 March 2026 · 0.36222 March 2026 · 0.67527 March 2026 · 0.3618 April 2026 · 0.27816 April 2026 · 0.77621 April 2026 · 0.43326 April 2026 · 0.27928 April 2026 · 0.5236 May 2026 · 0.59521 May 2026 · 0.22426 May 2026 · 0.66731 May 2026 · 0.6395 June 2026 · 0.6207 June 2026 · 0.4005 September 2026 · 0.279T3 · 31 May 2024 · 0.906T1 · 6 January 2025 · 0.853T3 · 22 March 2025 · 0.868T3 · 16 January 2026 · 0.807T3 · 20 February 2026 · 0.823T3 · 11 April 2026 · 0.916T3 · 11 May 2026 · 0.844
T1 methane-confident

6 January 2025

passes the spectral and wind tests · score 0.853 · Sentinel-2B
Sentinel-2 true-colour chip of Deonar on 6 January 2025VayuNetra plume mask over Deonar on 6 January 2025
Wind 5.1 m/s

Physics checks

B12 dimmed 5.2% while visible bands barely changed (2.2%).

  • B12 dimmed 5.2% (more than 1%)
  • B11 changed 0.3%, less than half of B12
  • Visible and near-infrared changed 2.2%, under half of B12
  • Plume lies 31° from the wind (within 45°)

Emission rate

≈ 20.2 t/h

68% range 15.1–25.0 t/h

Screening-grade satellite estimate: confirm with a hyperspectral satellite, an OGI drone or a ground survey before enforcement or carbon crediting.

T3 surface change, rejected as methane

11 May 2026

moisture · score 0.844 · Sentinel-2B
Sentinel-2 true-colour chip of Deonar on 11 May 2026
Wind 2.7 m/s

Physics checks

B12 dimmed 1.1%, but visible bands changed 1.3% too: a surface change, not methane.

  • B12 dimmed 1.1% (more than 1%)
  • B11 changed 0.2%, less than half of B12
  • Visible and near-infrared changed 1.3%, more than half of B12
  • Plume lies 78° from the wind (more than 45°)

Emission rate

Rejected as methane: no emission rate is reported for surface change.

T3 surface change, rejected as methane

11 April 2026

fresh waste · score 0.916 · Sentinel-2B
Sentinel-2 true-colour chip of Deonar on 11 April 2026
Wind 1.2 m/s

Physics checks

B12 brightened 0.6%: a surface change, not methane.

  • B12 brightened 0.6%
  • B11 changed 3.2%, less than half of B12
  • Visible and near-infrared changed 2.5%, more than half of B12
  • Plume lies 35° from the wind (within 45°)

Emission rate

Rejected as methane: no emission rate is reported for surface change.

T3 surface change, rejected as methane

20 February 2026

moisture · score 0.823 · Sentinel-2B
Sentinel-2 true-colour chip of Deonar on 20 February 2026
Wind 0.5 m/s

Physics checks

B12 dimmed 0.1%, but visible bands changed 2.9% too: a surface change, not methane.

  • B12 dimmed only 0.1% (needs more than 1%)
  • B11 changed 0.6%, as much as B12
  • Visible and near-infrared changed 2.9%, more than half of B12
  • Plume lies 15° from the wind (within 45°)

Emission rate

Rejected as methane: no emission rate is reported for surface change.

T3 surface change, rejected as methane

16 January 2026

fresh waste · score 0.807 · Sentinel-2C
Sentinel-2 true-colour chip of Deonar on 16 January 2026
Wind 0.8 m/s

Physics checks

B12 brightened 1.7%: a surface change, not methane.

  • B12 brightened 1.7%
  • B11 changed 5.9%, less than half of B12
  • Visible and near-infrared changed 0.9%, more than half of B12
  • Compact plume (elongation 1.8): wind alignment not required

Emission rate

Rejected as methane: no emission rate is reported for surface change.

T3 surface change, rejected as methane

22 March 2025

moisture · score 0.868 · Sentinel-2C
Sentinel-2 true-colour chip of Deonar on 22 March 2025
Wind 1.5 m/s

Physics checks

B12 dimmed 1.3%, but visible bands changed 9.8% too: a surface change, not methane.

  • B12 dimmed 1.3% (more than 1%)
  • B11 changed 5.5%, less than half of B12
  • Visible and near-infrared changed 9.8%, more than half of B12
  • Plume lies 69° from the wind (more than 45°)

Emission rate

Rejected as methane: no emission rate is reported for surface change.

T3 surface change, rejected as methane

31 May 2024

moisture · score 0.906 · Sentinel-2B
Sentinel-2 true-colour chip of Deonar on 31 May 2024
Wind 3.7 m/s

Physics checks

B12 dimmed 3.5%, but visible bands changed 13.3% too: a surface change, not methane.

  • B12 dimmed 3.5% (more than 1%)
  • B11 changed 1.1%, less than half of B12
  • Visible and near-infrared changed 13.3%, more than half of B12
  • Compact plume (elongation 1.5): wind alignment not required

Emission rate

Rejected as methane: no emission rate is reported for surface change.

Emissions

  • T1 · 6 Jan 2025

    ≈ 20.2 t/h (68% range 15.1–25.0 t/h)

t CO₂e per year, GWP100 = 27
46,801
t CO₂e per year, GWP20 = 79.7
1,38,149

Minimum estimate: 198 kg/h averaged over 102 passes, counting T1 days only.

Screening-grade satellite estimate: confirm with a hyperspectral satellite, an OGI drone or a ground survey before enforcement or carbon crediting.

Detection and limits

Steady emission above 10 t/h is ruled out (95%).

Over dense Indian landfills a single pass catches about 25–35% of plumes of 10 t/h or more.

Control point: 0 flags in 97 passes · p vs control 0.008

Screening-grade satellite estimate: confirm with a hyperspectral satellite, an OGI drone or a ground survey before enforcement or carbon crediting.