NPP Global Browse

This web page contains global browse images of selected NPP VIIRS products to enable synoptic quality assessment of VIIRS Land products via the internet. These browse images are generated from the coarse 6km version of the products made at Land PEATE by resampling the full resolution data products generated at IDPS (operational xDRs/IPs) and at Land PEATE (Land PEATE Adjusted versions of xDRs/IPs/DDRs). The coarse spatial resolution products are projected into a global coordinate system defined with pixel sizes corresponding to 20km in the Hammer-Aitoff projection. These global browse images are generated with fixed contrast stretching and color look-up tables to enable consistent temporal comparison. This web interface has been developed to support interactive selection of browse products and zooming at 6km resolution.

VIIRS instrument was turned on 11/10/2011 (2011314) with the nadir door closed. Nadir door was opened at 16:00 GMT on 11/21/2011 (2011325). The global browse images of products for the period from day 2011314 until the opening of the nadir door on day 2011325 are made from the data products generated using the VIIRS data from back of the door. For this period (2011314 - 2011324) the browse contained weak noisy signals in SDR and correspondingly in the downstream products. The L1B browse images are generated by stretching the TOA reflectance in the range 0 - 0.00024417145 for the visible bands.

The browse images of products from day 2011325 (after 16:00 GMT) and onwards are from the earth view data. However, since the thermal bands were very noisy until they are cooled down on 2012020 after opening of the cooler door on 2012018, the browse images of products that use thermal bands contained significant noise and striping. For example, the cloud mask and all of the products that depend on the cloud mask such as surface reflectance, land surface temperature, vegetation index, snow and sea_ice etc for the period 2011325-2012020 contain significant noise and striping from the period.

Please note that the products are currently BETA quality and are not intended for scientific use. For more information on product quality and product quality issues please see the product quality documentation and also product known issues web pages. VIIRS calibration is based on prelaunch data and on-orbit calibration and characterization has begun. Currently, data from the visible, near infrared (NIR), and day-night (D/N) bands are beta quality. The higher order products will not be useable in the near future because they are in early stages of development and evaluation.

Note: The global browse images available on this web site should not be used for scientific analyses. The Land Cloud Mask (VNP35_L2) and Land Aerosol (VNP04_L2) are generated using the Mx8 version of the IDPS algorithms with NASA science team recommended changes, exclusively for use as input in generation of the NASA VIIRS Land records at Land SIPS. These products may have differences compared to similar records generated at IDPS or other SIPS and should not be considered as equivalent products.

Note: For browse images of L1B from processing of J1 VIIRS click here. The VIIRS instrument on-board J1 was activated on 11/28/2017. Browse images are available for days starting 12/13/2017, the day nadir door was opened. Please note that the instrument is undergoing calibration testing and L1B data is not expected to be of science quality. J1 forward global browses    J1 NRT browses

1. Select products:
L1B:
NPP_VMAE_L1 (Moderate)
NPP_VIAE_L1 (Imagery)
NPP_VDNE_L1 (Day/Night Band)

     		L2:
L2 Cloud Mask
VNPAMI_L2 (L2 Aerosol Model)
Aerosol Optical Thickness
VNP09 (Surface Reflectance 750m/375m)
VNP09CMG (Surface Reflectance CMG)
VNP10 (Snow Cover)
VNP14IMG (Fire Mask)
VNP14 (Fire Mask)
VNP21 (Land Surface Temperature)
VNP29 (Sea Ice)
VNP30 (Ice Surface Temperature)

   		L2G/L3 Daily:
VNP09GA (Surface Reflectance 1km/500m, L2G-lit)
 VNP15A1H (Daily Lai/Fpar)
 VNPHDFSR (Filtered Surface Reflectance)
 VNP21A1D (Land Surface Temperature, Day)
 VNP21A1N (Land Surface Temperature, Night)
 VNP43IA1 (BRDF/Albedo Parameters)
 VNP43IA3 (Albedo)
 VNP43IA4 (Nadir BRDF-Adjusted)
 VNP43MA1 (BRDF/Albedo Parameters)
 VNP43MA3 (Albedo)
 VNP43MA4 (Nadir Reflectance)
     		n-day:
VNP09A1 (8-Day Surface Reflectance 1km)
VNP09H1 (8-Day Surface Reflectance 500m)
VNP13A1 (16-Day VI 1km)
VNP13A2 (16-Day VI 1km)
VNP13C1 (16-Day VI 1km CMG)
VNP13C2 (Monthly VI 1km CMG)
VNP15A2H (8-Day Lai/Fpar)
VNP21A2 (8-Day Land Surface Temperature)

    

2. Select Date-range:(YYYDDD)
Start date:     End date: 		3. Select Image Display Format: 4. Submit the form: Julian Day Calendar

Browse of AS5000 (V1)
Julian
day		   NPP_VMAE_L1
L1B Moderate input, Day
Band 5,4,3		 NPP_VIAE_L1
L1B Imagery input, Day
Band 1,2,1		 NPP_VDNE_L1
Night Band		 Cloud Mask
Day		 Cloud Mask
Night		 VNPAMI_L2
Aerosol Model		 Aerosol Optical Thickness VNP09
Surface Reflectance
Band I1/I2		 VNP09
Surface Reflectance
Band M5/M4/M3		 VNP09CMG
Surface Reflectance
Band I1/I2		 VNP09CMG
Surface Reflectance
Band M5/M4/M3		 VNP10
NDSI Snow Cover		 VNP14
Active Fire (Daytime)		 VNP14
Active Fire (Nighttime)		 VNP14IMG
Active Fire (Daytime)		 VNP14IMG
Active Fire (Nighttime)		 VNP21
Surface Temperature, Daytime)		 VNP21
Surface Temperature, Nighttime)		 VNP29
Sea Ice
Day		 VNP30
Ice Surface Temperature
Daytime		 VNP30
Ice Surface Temperature
Nighttime		 VNP09GA
Surface Reflectance
L2G-lit
Band I1/I2		 VNP09GA
Surface Reflectance
L2G-lit
Band M5/M4/M3		 VNPHDFSR
Surface Reflectance
Band5/7/5		 VNP15A1H
Fpar		 VNP15A1H
Lai		 VNP43IA1
BRDF/Albedo Parameters
I1,2,1		 VNP43IA3
White Sky Albedo
WSA I1		 VNP43IA4
Nadir BRDF-Adjusted
I1,2,1		 VNP43MA1
BRDF Albedo Parameters
M5,4,3		 VNP43MA3
Albedo WSA shortwave		 VNP43MA4
Nadir Reflectance
M5,4,3
2018
178
06/27		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data No Data No Data No Data No Data No Data No Data No Data
2018
177
06/26		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
176
06/25		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
175
06/24		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
174
06/23		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
173
06/22		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
172
06/21		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
171
06/20		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
170
06/19		 orbit track No Data No Data
2018
169
06/18		 orbit track No Data No Data No Data No Data No Data No Data No Data No Data
2018
168
06/17		 orbit track No Data No Data
Julian
day		   NPP_VMAE_L1
L1B Moderate input, Day
Band 5,4,3		 NPP_VIAE_L1
L1B Imagery input, Day
Band 1,2,1		 NPP_VDNE_L1
Night Band		 Cloud Mask
Day		 Cloud Mask
Night		 VNPAMI_L2
Aerosol Model		 Aerosol Optical Thickness VNP09
Surface Reflectance
Band I1/I2		 VNP09
Surface Reflectance
Band M5/M4/M3		 VNP09CMG
Surface Reflectance
Band I1/I2		 VNP09CMG
Surface Reflectance
Band M5/M4/M3		 VNP10
NDSI Snow Cover		 VNP14
Active Fire (Daytime)		 VNP14
Active Fire (Nighttime)		 VNP14IMG
Active Fire (Daytime)		 VNP14IMG
Active Fire (Nighttime)		 VNP21
Surface Temperature, Daytime)		 VNP21
Surface Temperature, Nighttime)		 VNP29
Sea Ice
Day		 VNP30
Ice Surface Temperature
Daytime		 VNP30
Ice Surface Temperature
Nighttime		 VNP09GA
Surface Reflectance
L2G-lit
Band I1/I2		 VNP09GA
Surface Reflectance
L2G-lit
Band M5/M4/M3		 VNPHDFSR
Surface Reflectance
Band5/7/5		 VNP15A1H
Fpar		 VNP15A1H
Lai		 VNP43IA1
BRDF/Albedo Parameters
I1,2,1		 VNP43IA3
White Sky Albedo
WSA I1		 VNP43IA4
Nadir BRDF-Adjusted
I1,2,1		 VNP43MA1
BRDF Albedo Parameters
M5,4,3		 VNP43MA3
Albedo WSA shortwave		 VNP43MA4
Nadir Reflectance
M5,4,3