MSL YEAR 3 SUMMER WEATHER DATA (LS 270 TO 0 (360)

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This page updated on 1/25/2018.

On Table 1 column subjects and color codings are as follows:

Column A (Sol). The Martian day is about 39 minutes longer than the terrestrial day.

Column B is solar longitude (Ls). MSL is in the Southern Hemisphere on Mars. The landing was at Ls 150 in winter. Ls 180 begins the spring there.  Ls 270 starts summer, Ls 0 starts the fall. Ls 90 starts the winter.

Column C shows the pressure reported by the REMS Team.

Column D shows the date on Earth.

Column E shows the maximum air temperature. With respect to the freezing point, from 0° C at 1 atm pressure it will increase up to 0.01° C at 0.006 atm (which is about the average pressure on Mars as given by NASA). This is the triple point of water. At pressures below this, water will never be liquid. It will change directly between solid and gas phase (sublimation). The temperature for this phase change, the sublimation point, will decrease as the pressure is further decreased

Column F shows minimum air temperature.

Column G shows the air temperature range for each sol. On Earth temperatures can vary by 40 °C in deserts. In column G where the range is 59 °C or less yellow background coloring points that out. The National Park Service claims the world record in a diurnal temperature variation is 102 °F (57 °C) (from 46 °F (8 °C) to −56 °F (−49 °C)) in Browning, Montana (elevation 4,377 feet/1,334 meters) on January 23 to 24, 1916. There were 2 days in Montana where the temperature changed by 57 °C.

Column H shows temperature range divided by 40. This allows us to compare terrestrial deserts with Gale Crater, Mars. How much cooling occurs at night is related to the density of the atmosphere. Here we see the ratio of cooling on a Mars sol to the typical 40 °C cooling figure for Earth's deserts shown with a green background when that ratio is under 1.5. For MSL Year 1 when we altered the devisor from 40 °C  to 57 °C then 88 of the ratios were altered to 1 or less than 1, meaning that Martian air pressure is indeed likely much higher than NASA claims.

Column I shows maximum ground temperature. As with terrestrial deserts, the ground on Mars heats more during the day than the air does, and it cools more at night than the air does. In Column K when the maximum ground temperature is given by REMS is above 0°C it is shown with a red background.

Column J shows the minimum ground temperature. When it is -90 °C or colder the background is in purple. The ground temperatures are not very precise. The requirement was to measure ground brightness temperature over the range from 150 to 300 K with a resolution of 2 K and an accuracy of 10 K. 

Column K. Drop in ground temperature from day to night.

Column L shows the increase in temperature from the mast 1.5 meters above the ground down to the ground during the daylight hours. In column N anytime there is an increase in temperature of 11 °C or more this in indicated with a dark blue background.

 

Column M shows the decrease in temperature from the ground to the air at nights. If the data were valid we would expect similar heating or cooling to occur over the set distance from ground to boom. A quick survey of the data immediately shows that this was not found. In column L we see a variation in heating between 0 °C and at least 15 °C with a 54 °C anomaly on Sol 1,070. For nighttime cooling any variation from 11°C to 19°C is shown with a medium blue background. More than that is shown with a dark blue background.

Column N shows the pressure for the same Ls in MSL Year 1.

Column O shows the absolute value of the change in pressure in Pascals from the same Ls in the previous year (Column [M] - [C]).

Column P shows the original pressure for the same Ls in MSL Year 1 before JPL revised their data.

Column Q shows the Ls during Year 1.

Column R shows the UV for the sol in Year 2.

Column S shows the UV for the sol in Year 1. All sols in MSL Year 1 and Year 2 have opacity listed as “sunny” which seems dubious.

Column T shows comments, if any.

 

 

 

A

B

 C

D

E

F

G

H

I

J

 K

 L M N O P Q R S T
 

SOL

~LS

PRESSURE

Pa   

EARTH

DATE

MAX

AIR

TEMP

°C   

MIN

AIR

TEMP

°C

AIR

TEMP

RANGE

°C

AIR

TEMP

RANGE

°C/40

MAX

GROUND

TEMP °C

MIN

GROUND

TEMP °C

∆ GROUND

TEMP

DAY

TO

NIGHT

DAYTIME

CHANGE

IN TEMP 

°C AIR

TO GROUND

NIGHTTIME

CHANGE

IN TEMP

°C AIR TO

GROUND

PRESSURE

AT SAME

LS IN MSL

YEAR 2

∆ PRESSURE

YEAR 3 TO

YEAR 2 SAME

LS 

~LS

year 2

PRESSURE    

YEAR 1 

BEFORE

REVISION 

UV

YR

3 

UV

YR

2

MSL YEAR 2 SOL FOR THIS LS/

COMMENTS
             

YELLOW IF

<60 °C

GREEN IF

<1.5

RED IF

> 0 °C

PURPLE =

 >-90°C

OR COLDER

Yellow numbers

= -80 to -89 °C,

red background =

-90°C or colder 

drop

BLUE =

>10°C

PURPLE

= >10°C

   YELLOW = 
> 7 Pa)		          
 

1534

 270 898 11/29/2016 -2 -73 71 1.775 13 -76 -89 15 -3 911 -13 270  N/A  H M, Year 1 was H 

(866)

MSL first day of summer

 

1535

 270 900  11/30/2016 -1 -73 72 1.8 12 -77 -89 13 -4 910 -10 271 N/A H M, Year 1 was H

(867)
 

1536

 271 901 12/1/2016 -4 -71 67 1.675 12 -78 -90 16 -7 908 -7 272 N/A H M, Year 1 was H  (868)
 

1537

 272 900 12/2/2016  -7 -74 67  1.675  12 -78 -90  19 -4   906 -6  272 N/A  H M, Year 1 was N/A (869)
 

1538

 272  898 12/3/2016  -3 -73 70 1.75  13 -77 -90  16 -4   909  -11 273 N/A  H  M, Year 1 was N/A  (870) 
 

1539

 273 896 12/4/2016  -1 -74 73 1.825 13 -78 -91 14  -4 903  -7 273 N/A H  M, Year 1 was N/A (871)
 

1540

 274 896 12/5/2016 -3 -74 71 1.775 13 -76 -89 16 -2 902 -6 274 N/A H M, Year 1 was N/A  (872)
 

1541

 274 895 12/6/2016 -8 -76 68 1.7 13 -78 -91 21 -2 N/A   N/A 275 N/A  H 

N/A. Year 1 also N/A

 (873) 
  1542 275 895  12/7/2016  -9 -73 64 1.6 12  -79 -91  21  -6 N/A  N/A  275 N/A  H 

N/A. Year 1 also N/A

 (874) 
   1543 276 896  12/8/2016  -7 -74  67 1.675  12  -78  -90 19 -4 N/A  N/A   276 N/A  H

N/A. Year 1 also N/A

 (875) 
  1544 276  894 12/9/2016  1 -71  72 1.8  12   -76 -88 11 -5 N/A  N/A  277 N/A  H 

N/A. Year 1 also N/A

 (876) 
  1545 276 891 12/10/2016   3 -73  76 1.9  13  -76 -89  10 -3 N/A  N/A  277 N/A  H 

N/A. Year 1 also N/A

 (877) 
  1546 277 889 12/11/2016   -7  -73  66 1.65 13  -76  -89    20 -3  N/A  N/A  278 N/A  H

N/A. Year 1 also N/A

 		 (878) 
  1547 278 887 12/12/2016   -8 -75 67  1.675 14 -77 -91  22 -2 N/A  N/A   279 N/A    H 

N/A. Year 1 also N/A

 		 (879) 
  1548 279 887  12/13/2016  -8  -76 68  1.7    13   -77  -90  21 -1 872
 +15  279  858 later revised to N/A
 M

N/A (was M). Year 1 also N/A

 (880)
  1549 279 887  12/14/2016  -2 -76  74 1.85 14   -76 -90  16  0 895  -8  280 899  H  

M. Year 1 was N/A

 (881)
  1550 280 888
12/15/2016 -1 -71 70 1.75  13 -77 -90  14 -6 901 -13 280  N/A   H 

M. Year 1 was N/A

 (882)
  1551 281 886  12/16/2016    0   -71  71  1.775    14   -78 -92 14 -7 897 -11 281 N/A  H

M. Year 1 was N/A

 (883)
  1552 281 886 12/17/2016   -6 -74 68   1.7     14    -77 -91 20 -3 897 -11 282 N/A  H

M. Year 1 was N/A

 (884)
  1553 282 884 12/17/2016  -9 -77 68  1.7   13 -80 -93 22 -3 895 -11  282  N/A VH

M. Year 1 was N/A

 (885)
  1554 283 894 12/19/2016  -19 -70 51 1.275 11 -75 -86 30 -5 894 0  283 N/A VH

M. Year 1 was N/A

 (886) The Sol 1554 data is apparently odd in numerous ways. Watch for JPL to revise 10 Pa pressure rise and 30K change in max air temp to max ground temp. In the past errors like these also were noted for sols with VH UV values. See Figure 1.
 

1554

REVISED

 283 882 12/19/2016 -7 -70 63  1.575 12 -75 -87 19 -5  894 -12 283  N/A  VH  

M. Year 1 was N/A

 (886) THE PREDICTION ABOVE THAT JPL WOULD REVISE DATA FOR FOR 1554 WAS CORRECT. SEE FIGURE 1.
 

1555

 283  883 12/20/2016 -6 -71 65 1.625   13  -76 -89 19  -5  897 -14 284 N/A   VH 

M. Year 1 was N/A

 (887) A green sphere was seen again on Sol 1555.
 

1556

 284 883  12/21/2016 -5  -72 67 1.675  13  -74 -87  18 -2 896 -13 284 N/A   VH 

H. Year 1 was N/A

 (888) 
 

1557

 284 883  12/22/2016  -6  -74 68 1.7  13   -74 -87  19    0  895 -12 285 N/A   VH 

H. Year 1 was N/A

 (889) 
 

1558

 285 880 12/23/2016  -6   -72   66 1.65 13   -75 -88 19   -3 892 -12 286  N/A  H  changed to VH

H. Year 1 was N/A

 (890)
 

1559

 286 879 12/24/2016   -7  -76 69 1.725 14 -76 -90  21 0  892   -13 286   N/A  VH 

H. Year 1 was N/A

 (891) 
 

1560

 286 877 12/25/2016   -10  -76  66  1.65  13  -76  -89  23 0  892  -15 287  N/A  VH 

H. Year 1 was VH

 		 (892) 
 

1561

 287  877  12/27/2016  -8 -77 69  1.725  13  -77 -90  21 0  890 -13 287 N/A VH  H. Year 1 was VH  (893) 
 

1562

 288  877  12/28/2016   -5 -73 68  1.7  14  -74 -88  19  -1  891 -14 288  N/A  VH  M. Year 1 was VH  (894) 
 

1563

 288  879 12/29/2016 -6 -75 69   1.725  14  -77  -91 20  -2 889 -12  289  N/A  VH  H. Year 1 was VH  (895) 
 

1564

 289  872 12/30/2016  -7 -70 63 1.575 12 -74  -86 19  -4 888 -16 289  N/A  VH  H. Year 1 was VH  (896)
 

1565

 290  874 12/31/2016  -6  -72 66 1.65  13  -77  -90  19  -5 884 -10  290  N/A  VH  H. Year 1 was VH  (897) 
 

1566

 290  876  1/1/2017 -6  -76 70  1.75  13  -76  -89  19    0  883   -7   291   N/A  VH  VH. Year 1 was VH   (898)  
 

1567

 291   870 1/2/2017  -5 -70 65 1.625  13  -75 -88 18 -5 881 -11 291   N/A  VH  VH. Year 1 was VH   (899)  
 

1568

 291 876 1/3/2017 -5  -71 66 1.65  14 -75  -89  19  4 883    -7  292  N/A   VH   H. Year 1 was VH  (900)   
 

1569

 292 873 1/4/2017  -5  -70 65 1.625   12 -75  -87 17 -5  885 -12  292  N/A  VH  H. Year 1 was VH  (901) 
 

1570

 293 873  1/5/2017  -6 -71  65 1.625    13 -74 -87  19  -3 883  -10 293 N/A  VH  H. Year 1 was VH  (902) 
 

1571

 293 873 1/6/2017  -3 -70   67 1.675   18 -75  -93 21  -5  882 -9 294 N/A  VH  H. Year 1 was VH  (903) A green sphere was seen again on Sol 1571.
 

1572

 294 869 1/7/2017  -6 

-81 

 

  75 1.875   13  -80  -94 19  1 878 -9 294  N/A H  H. Year 1 was VH  (904) Possible frontal passage may be indicated by colder night temps after an unusually high ground temp on the previous sol.
 

1573

 295 872 1/8/2017  -2 -74   72 1.8   13  -75   -88  15  -1  880 -8 295 N/A  H  H. Year 1 was VH  (905)  
 

1574

 295 868 1/9/2017 4  -72 76 1.9 15 -76 -91 11 -4 878 -10 296  N/A  VH  H. Year 1 was VH   (906) 
 

1575

 296 860 1/10/2017 0  -58 58 1.45 17 -62 79 17 -4  879 -19 297 N/A  H  H. Year 1 was VH   (907) Unusually warm low air and ground temperatures. 19 Pa pressure difference from MSL Year 2 is off the curve. Watch for JPL to alter their report (shown below as Figure 2) for Sol 1575.
 

1575

Revised

 

 296 871

1/10/2017

Revised

as predicted

 0  -73 73 1.825 17 -76 -93 17 -3 879 -8 297 N/A H H. Year 1 was VH (907) Bingo! Predicted changes in pressure and temperature above were carried out by NASA one day after the prediction. During this day this chart was first accessed by someone in Scottsdale, AZ believed to be associated with NASA.  See Figure 2 again.
 

1576

 296 869 1/11/2017 -1 -72 71 1.775  16 -77 -93 17 -5 878  -9  297  N/A  VH   H. Year 1 was VH   (909) 
 

1577

 297 866 1/12/2017 -3 -72  69 1.725   17 -80 -97 20 -8 878  -12 298 N/A  H  H. Year 1 was VH  (910)  
 

1578

 298 868 1/13/2017 -5 -74 69  1.725  17 -80  -97  22 -6 874 -6 299 N/A  VH   H. Year 1 was VH  (911)  
 

1579

 298 862 1/14/2017 -3  -73  70 1.75  16  -79 -95 19 -6 875  -13  299 N/A  H  H. Year 1 was VH  (912)  
 

1580

 299 867 1/15/2017 -2 -72  70  1.75  16  -77  -93 18 -5  871 -4 300 N/A  H  H. Year 1 was VH  (913)  
 

1581

 299 862 1/16/2017 -1 -72 71
1.775 16  -78 -94 17 -6 874  -12 300  N/A   H  H. Year 1 was VH  (914)  
 

1582

 300 862 1/17/2017 -1  -74 73 1.825  20 -75 -95 21 -1  878 -16 301  N/A   H  H. Year 1 was VH   (915) 
 

1583

 301 862 1/18/2017 -4 -75  71  1.775  17 -79 -96 21  -4 872 -10 302 N/A   VH  H. Year 1 was VH.  (916)  
 

1584

 301 863 1/19/2017  -2 -77  75   1.875  17  -79  -96  19 -2 871 -8 302  N/A  VH  H. Year 1 was H. (917) 
 

1585

 302 864 1/20/2017  -2  -76 74 1.85  13 -76  -89 15  0  867 -3 303 N/A  VH  H. Year 1 was H. (918)
 

1586

 303 858 1/21/2017  -1  -72 71  1.775   14 -77  -91 15 -5 870 -12 304 N/A  VH  H. Year 1 was VH. (919) 
 

1587

 303 860 1/22/2017 -1 -73 72  1.8  16 -77 -93 17 -4 868 -8 304  N/A   VH  H. Year 1 was VH. (920)
 

1588

 304 858 1/23/2017 0 -72 72  1.8  12 -76 -88 12 -4  867  -9 305 N/A   VH VH. Year 1 was VH.  (921)
 

1589

 304 857 1/24/2017 -2 -72 70 1.75  12 -78 -90 14 -6 870 -13 305  N/A  VH VH. Year 1 was VH.   (922)
 

1590

 305 860 (changed fron 864) 1/25/2017 -1 -76 75 1.875   15 -79 -94 16 -3  867   -7 (changed from -3) 306 N/A  M  (changed from VH) VH. Year 1 was VH.   (923)
 

1591

 306 852 1/26/2017  -1  -73 72 1.8  15  -78 -93  16  -5 867  -15 307 N/A   M   VH. Year 1 was VH.   (924)
 

1592

 306 857  1/27/2017  0  -71 71 1.775 18 -79  -97 18 -8 862 -5  307 N/A  M    H. Year 1 was VH.  (925) 
 

1593

 307 852 1/28/2017  -1  -72  71 1.775 16 -80   -96V 17 -8 864 -12 308 N/A  M    H. Year 1 was VH.  (926) 
 

1594

 307 855 1/29/2017 -6 -74 68 1.7  15 -78  -93 21  -4 862  -7 308  N/A  H  VH. Year 1 was VH.   (927)  
 

1595

 308 855 1/30/2017 -7 -71  64 1.6 14 -79 -93  21  -8   862  -7 309 N/A  H  VH. Year 1 was H.   (928) 
 

1596

 309 850 1/31/2017 -6  -74   68   1.7   13   -78   -91 19 -4  866 -16 310 N/A  VH  VH. Year 1 was H  (929) 
 

1597

 309 855 2/1/2017 -8 -73 65 1.625  15  -76 -91   23 \3 -3 865 -10 310  N/A  VH  VH. Year 1 was H  (930) 
 

1598

  310  849 2/3/2017  -4 -70 66 1.65  14 -78 -92 18 -8 864 -15 311 N/A  VH VH. Year 1 was N/A
 (931)
 

1599

  310  853 2/4/2017  -7 -72 65 1.625  13 -76  -89   20 -4 859 -6 311 N/A  VH  VH. Year 1 was N/A (932)
 

1600

  311 850 2/5/2017  -7 -71 64 1.6  12 -76   -88 19 -5 863 -13 312 N/A  VH  VH. Year 1 was N/A (933)
 

1601

 312 853 2/6/2017  -2 -71  69 1.725  14 -78 -92  16 -7 858
-5 313 874 H  VH. Year 1 was N/A (934)
 

1602

 312 852 2/7/2017  -5 -77 72 1.8 15 -79 -94 20  -2 862  -10 313  N/A  VH  VH. Year 1 was N/A (935)
 

1603

 313 847 2/8/2017   -5  -76 71 1.775  14  -78  -92  19  -2  865 -18 314 N/A  VH  VH. Year 1 was N/A (936)
 

1604

 313  850 2/9/2017  -11 -77 66   15 -77  -92  26  0  865 -15 314 N/A  H  VH. Year 1 was H
 (937)
 

1605

 314 815 2/10/2017 -13 -54 41 1.025 10 -61 -71  23 -7 N/A  N/A 315  N/A  H  N/A. Year 1 was H (938) Pressure looks too low, low temps look too high. Watch for changes by JPL. See Figure 3.
 

1605
Revised

 314 846 2/10/2017 -13 -73 60 1.5 14 -78 -92 27 -5 N/A  N/A  315 N/A  VH N/A. Year 1 was H (938) Pressure and low temperatures revised as predicted above. UV also revised. . See Figure 3.
 

1606

 315 850 2/11/2017 -10 -75 65 1.625  9 -77  -86 19   -2  827. This pressure was not revised by JPL but looks too low
 +23 316 N/A  H  N/A changed from low. Year 1 was H  (939) Low year looked  too low.
 

1607

 315 846 2/12/2017 -12 -77 65  1.625   11 -78 -89 23  -1 861 -15  316  N/A  H VH. Year 1 was H. (940) 
 

1608

 316 847 2/13/2017 -8 -72 64 1.6 10 -78  -88  18  -6  857   -10  317 N/A  H  H. Year 1 was H. (941)  
 

1609

 316
 
847 
 2/14/2017  -7  -71 64  1.6  10  -75 -85 17 -4 857   -10  317  N/A   VH H. Year 1 was H.  (942) 
 

1610

 317
864
 2/15/2017  -49 -75 26 0.65  -38 -74 -36  11 -1 854  -10  318 N/A   L H. Year 1 was H.   (943) This sols's data will likely be revised by JPL. high temps are too cold, all previous L uV has been revised and presure increase of 17 Pa from previous sol is large. See Figure 4.
 

1610 revised as predicted

 317
N/A  
 2/15/2017 N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   N/A   854  -10  318 N/A N/A N/A (943) This sol was revised as  predicted. Once again the low UV is wiped out.
 

1611

 318
798
 2/16/2017  N/A  N/A  N/A  N/A  N/A  N/A  N/A  N/A  N/A  852  -54  318  318  L  H. Year 1 was H.  (944) Apparent malfunction. uV still low. Pressure drop of 54 Pa from Year 2 unlikely to be real.
 

1611 revised

 318
N/A 
 2/16/2017 N/A N/A N/A N/A N/A N/A N/A N/A   852 -54 318  318  N/A H. Year 1 was H  (944) This sol was revised as  predicted, once again wiped out a low UV. 
 

1612

 318
812
 2/17/2017  -11 -53 44 1.1 15 -23 -38 26  +30 851  -39 319 N/A  H  H. Year 1 was H.  (945) Minimum temperatures too warm. Pressure drop of 39 Pa from Year 2 unlikely to be real.
 

1612

revised

 318  N/A   2/17/2017   N/A  N/A  N/A    N/A  N/A   N/A    N/A  N/A   N/A   851  851  319  N/A  N/A  H. Year 1 was H.  (945) This sol was revised as  predicted,
 

1613

 319 846 2/18/2017  -2 -72 70 1.75  15 -84 -99 17  -12  850 -4 320 N/A H   H. Year 1 was H.   (946)
 

1614

 319
837
 2/19/2017  -8 -73  65 1.625 14 -87 -101 22 -14 853 -16 320  N/A H   H. Year 1 was H.   (947) Drop of 101 degrees from day to night would tie previous record.
 

1615

 320
842
 2/20/2017  -5 -73  68 1.7  14  -79 -93 19  -6  854 -12 321 N/A  H  H. Year 1 was H.   (948) 
 

1616

 320
848
 2/21/2017 
 		 -8  -73  65  1.625  13 -85 -98 21 -14  851 -3 321 N/A  H  H. Year 1 was H.   (949) 
 

1617

 321
840
 2/22/2017  -8 -72 64 1.6 18 -80 -98 26 -8  850  -10 322 N/A VH H. Year 1 was H.  (950) 
 

1618

 322
845
 2/23/2017 -7 -71 64  1.6  12 -78 -90 19  -7 849  -4 323  N/A  VH  H. Year 1 was H.  (951)  
 

1619

 322
841
 2/24/2017 -8  -73 65  1.625  11 -89 -100 19  -16 847 -6 323  N/A  VH  H. Year 1 was H.  (952)  
 

1620

 323
844
 2/25/2017 -9 -70 61 1.525   12  -86 -98 21  -16  847 -3 324 N/A  VH  H. Year 1 was H.  (953)  
 

1621

 323
842
 2/26/2017 -13 -73 60 1.5 10 -85 -95 23 -12 847  -5 324  N/A  H  H. Year 1 was H.   (954)  
 

1622

 324
841
 2/27/2017 -9 -71 62 1.55 10 -76 -86 19  -5  N/A  N/A  324 N/A  H
N/A. Year 1 was H. 		 (955)
 

1623

 324
840
 2/28/2017 -10  -71  61 1.525    10  -76 -86 20 -5  N/A 

 N/A 

 

 325 N/A  H
N/A. Year 1 was H. 		 (956)
 

1624

 325
836
 3/1/2017 -8 -72 64 1.6  9 -76  -85  17 -4 N/A (changed from 823)  N/A  326 N/A  H N/A (changed from H). Year 1 was H.  (957)
 

1625

 326
839
 3/2/2017 -8 -71 63 1.575 10 -77
-87 18 -6 848 -9 327  N/A   H H. Year 1 was H.  (958) 
 

1626

 326
839
 3/3/2017 -11 -71 60 1.5 10 -76 -86 21 -5 846 -7 327  N/A   H H. Year 1 was H. (959) 
 

1627

 327
838
 3/4/2017 -9 -72 63  1.575  10 -75 -85 19 -3 846 -8 328 N/A   H H. Year 1 was H.  (960) 
  1628 327 839 3/5/2017 -8 -71  63   1.575  9 -81 -90 17 -10 845 -6 328 N/A  H H. Year 1 was H.  (961) 
 

1629

 328
837
 3/6/2017 -8 -74 66  1.65 9 -77 -86  17 -3  849 -12 329 N/A  H H. Year 1 was H.  (962) 
 

1630

 328 838 3/7/2017 -6 -77 71  1.775   8 -77 -85 14 0 850 -12  329  N/A  H H. Year 1 was H.   (963)
 

1631

 329
837
 3/8/2017 -6 -77 71   1.775   12 -78 -90 18 -1 847 -10 330 N/A  H H. Year 1 was H.   (964)
 

1632

 330
836
 3/9/2017 -4 -72 68 1.7  12 -78 -90 16 -6 847  -10  330 N/A H H. Year 1 was H.    (964 again) For the last Martian month the Ls from MSL Year 2 has differed from the Ls in Year 3 by one half to one degree. Therefore instead of using Ls 331 data from Sol 965 of Year 2 here, the data from Sol 964 is repeated.
  1633 330
834
 3/10/2017 -4 -75   71   1.775  13 -78 -91 17 -3 847 -13 331  N/A H H. Year 1 was H.    (965)
 

1634

 331
834
 3/12/2017 -5 -72 67 1.675  12 -83 -95 17 -11 850  -16 331 N/A H H. Year 1 was H.    (966)
 

1635

 331
833
 3/13/2017 -7 -73 66 1.65 16 -79 -95 23 -6 844 -11 332 N/A  H H. Year 1 was H.  (967)
 

1636

 332
834
 3/14/2017 -14 -72 58 1.45 16 -80 -96 30 -8 848 -14 332  N/A  H H. Year 1 was H.   (968). The 30 degree increase in temp air to ground is extraordimary. Watch for a modifcation by JPL.
 

1637

 332
833
 3/15/2017 -10 -73 63 1.575 15 -83 -98 25 -11 844
 		 -11  333 N/A  H H. Year 1 was H.  (969)
 

1638

 333 833 3/16/2017   -9 -73  64 1.6  15  -81 -96  24 -8  849 -16 333  N/A  H  H. Year 1 was H.   (970) 
 

1639

 334
832
 3/17/2017   -6 -71 65 1.625  13 -80 -93 19 -9 848 -16 334   N/A H  M. Year 1 was H.   (971) 
 

1640

 334
828
 3/18/2017  -8 -72 64  1.6   13
-98

-111

21 -26 847 -19 334  N/A  H  H. Year 1 was H.  (972) The low ground question is hard to accept.  There is no corresponding great drop in air temp. Watch for a revision. Greatest variation in ground temp. ever! See Figure 5.
 

1641

 335
831
 3/19/2017  -6  -72  66 1.65 15 -82 -97 21  -10 844 -13 335 N/A  H   H. Year 1 was H. (973) 
 

1642

 335
829
 3/20/2017 -13 -72 59 1.475  11 -81 -92 24 -9  842 -13  336 N/A  H H. Year 1 was H.  (974)
 

1643

 336
832
 3/21/2017 -11 -74 63 1.575 14 -81  -95 25 -7 843 -11 336 N/A  H H. Year 1 was H.  (975)
 

1644

 336
832
 3/22/2017 -10 -74  64  1.6  13 -102 -115 23 -28 842 -10 337 N/A  H M. Year 1 was H.  (976) Once more the low ground question is hard to accept.  There is no corresponding great drop in air temp. Watch for a revision. Greatest variation in ground temp. ever!
  1645 337 832 3/23/2017 -3 -74 71 1.775 14 -83 -97 17 -9 841 -9 337 N/A  H M Year 1 was H. (977)
  1646 338 831 3/24/2017 -8 -74 66 1.65  11 -93 -104 19  -19  842 -11 338  N/A   H M Year 1 was H.  (978) This night time low in ground temperature is not backed by a corresponding low in air temperature. 
  1647 338 831 3/25/2017 -3 -73 70 1.75 6 -78 -84 9 -5 841  -10 338  N/A   H M Year 1 was H.  (979)
  1648 339 830 3/26/2017 -14 -73 59 1.475 7 -79 -86 21 -6 840 -10  339  N/A  H M Year 1 was H.  (980)
  1649 339 831 3/27/2017 -14 -74 60 1.5 11 -93 -104 25 -19    841   -10  339  N/A  H M Year 1 was H.  (981)
  1650 340 833 3/28/2017 -8 -75 67 1.675 12 -110 -122 20 -35 840 -7 340 N/A  H M Year 1 was H.  (982) The record 35 degree night time decrease in temp air to ground is extraordinary. See Figure 6. This is equal to a 63 degree Fahrenheit drop in 1.5 meters. Unless there is a machine generating this great cold, this must be an error.
  1651 340 833 3/29/2017 -8 -77 69 1.725 11 -105 -116 19  -28  840 -7  340  N/A  H M .Year 1 was H.  (983) Anomolous ground temperature lows continue.
  1652 341 834 3/30/2017 -15 -76 61 1.525  12 -92 -104 27 -166
 		   840  -6 341 N/A  H M Year 1 was H.  (984) 
  1653 341 833 3/31/2017 -15 -75 60 1.5 12 -84 -96 27 -9  840 -7  342 N/A  H M. Year 1 was H.  (985) Back to a more normal low ground temp.
  1654 342 829 4/1/2017 -17 -75 60  1.5  13 -84 -97 30  -9  840  -11 342  N/A  H M. Year 1 was H.   (986) 
  1655 342 831 4/2/2017 -14 -76 62 1.55  12 -99  -111 26 -23 839 -8 343 N/A  H M. Year 1 was H.   (987) 
  1656 343 832 4/3/2017 -3 -75 72 1.8 12 -105 -117 15 -30 840  -8 343 N/A  H M. Year 1 was H.   (988)

Unbelievably cold low ground temperature
  1657 343 836 4/4/2017 -9 -75 66 1.65  12 -66 -78 21 +9  841 -5 344 N/A  H  M. Year 1 was H.   (989) Unbelievably warm low ground temperature
  1658 344 835 4/5/2017 -8 -77 69  1.725 12 -111 -123 20 -34 839 -4 344 N/A  H  H. Year 1 was H.   (990) Unbelievably cold low ground temperature
  1659 345 832 4/6/2017 -7 -77 70  1.75  13 -88 -101 20  -11    840    -8 345 N/A  H  H. Year 1 was H.  (991)
  1660 345 832 4/7/2017 -5 -74 69  1.725  15 -85 -100 20  -11   842   -10  345  N/A  H  H. Year 1 was H.  (992)  
  1661 346 831 4/8/2017 -5 -75 70  1.75  14 -103 -117  19 -28  840    -9 346 N/A H  H. Year 1 was H.  (993) Unbelievably cold low ground temperature
  1662 346  831  4/9/2017 -3 -75  72 1.8  13  -83 -96  16 -8  842 -11 346  N/A  H   H. Year 1 was H.  (994)  
  1663 347 832  4/10/2017  -6 -74 68 1.7  10 -82 -92 16  -8  842  -10  347 N/A  H  H. Year 1 was H.   (995)  
  1664 347 832 4/11/2017 -8  -74  66 1.65   10  -103 -113 18 -27 842  -10  348 N/A  H  H. Year 1 was VH.   (996)  
  1665 348 833 4/12/2017  -7 -76 69  1.725  8 -106 -114 15  -30 842  -9  348 N/A  H   H. Year 1 was H.  (997)  
  1666 348 834 4/13/2017  -8 -76  68  1.7  7 -104 -111 15  -277 842  -8 349 N/A  H  H. Year 1 was H.   (998)  
  1667 349 833 4/14/2017  -9 -76  67 1.675  6 -103  -109 15 -28  N/A  N/A  349 N/A  H  H. Year 1 was H.   (999)  
  1668 349 831 4/15/2017  -4 -77 73 1.75  7  -104  -111  11  -30  841  -10 350 N/A  H  H. Year 1 was H.   (1000)  
  1669 350 833 4/16/2017  -12 -74   62 1.55  6  -104  -110 18  -30  853 revised to 841
 -20 revised to -8
 350 N/A  H  H. Year 1 was H.   (1001)   
  1670  350  834 4/18/2017  -12 -76  64 1.6  6  -116 -122 18  -40  844 -10  351 N/A  H  H. Year 1 was H.  

(1002)   Unbelievably cold low ground temperature.

Note: The coldest ground temperature low for the summer of MSL Years 1 and 2 was -87°C.
  1671 351 832 4/19/2017  -7 -76  69 1.725   7   -86 -93  144 -10  843 -11 351 N/A  H  H. Year 1 was H.   (1003)   
  1672 351 833 4/20/2017  -5 -74  69  1.725  9 -93  -99 14  -19 842  -9 352 N/A
 		 H  H. Year 1 was H.   (1004)   
  1673 352 836 4/21/2017  -6 -75 69  1.725    6    -109 -115  12  -34 843  -7 352  N/A  H  H. Year 1 was H.     (1005)
  1674 352 835 4/22/2017  -6  -75  69  1.725  2 -109  -111 8  -34  844 -9  353 870
 		 H  L revised to H. Year 1 was H.   (1006) 
  1675 353 835 4/23/2017  -6  -75
 		 69  1.725  4 -94 -98 10 -19  845 -10  353 832 H  L revised to H. Year 1 was H.   (1007) 
  1676 354 837 4/24/2017 -11 -76 65 1.625  10 -113 -123 21 -37 844   -7 354  867 H L revised to H. Year 1 was H.   (1008)
  1677 354 835 4/25/2017  -8 -74  66 1.65     7 -84 -91 15 -10 845  -10  354  N/A  H   H. Year 1 was H.   (1009) Low ground temp back to "normal."
  1678 355 836 4/26/2017  -11 -74  63 1.575      6    -84  -90 17 -10  846 -10  355 N/A  H  H. Year 1 was H.    (1010) 
  1679 355 836 4/27/2017  -12 -75 63  1.575  10 -84  -94 22 -9 845 -9 355 N/A  H  H. Year 1 was H.    (1011) 
  1680 356 835 4/28/2017 -11  -74  63  1.575  6  -88 -94  17  -14 846  -11  356  N/A  H  H. Year 1 was H.  (1012) 
  1681 356 837 4/29/2017 -12  -74  62 1.55   6  -85 -91 18 -11 846  -9 356  N/A  H  H. Year 1 was H.  (1013) 
  1682 357 839 4/30/2017 -13 -76 63  1.575   5 -115 -120  18 -39 846  -7 356  N/A  H  H. Year 1 was H.  (1014) Again, an unbelievably low ground temperature not really backed by the air temperature low.
  1683 357 837 5/1/2017 -15 -75 60  1.5 5  -91 -96 20 -16 847 -10 357 N/A  H  H. Year 1 was H.  (1015) 
  1684 358 837 5/2/2017 -14 -75 61  1.525 5 -89  -94 19 -14 847  -10  358  N/A  H  H. Year 1 was H.  (1016)
  1685 358 838 5/3/2017 -14  -77  63 1.575  8 -101 -109  22 -24 850 -12 359  N/A H  H. Year 1 was H.   (1017)
  1686 359 838 5/4/2017 -13 -75  62 1.55   6  -108 -114 19 -33 850  -12 359  N/A  H  H. Year 1 was H.   (1018)
  1687 359 838 5/5/2017 -11  -75  64 1.6 6  -82 -88  17 -7 853 -15 0  819 H  M. Year 1 was H.  

(1019) last day of Summer
 

SOL

 ~LS

PRESSURE Pa  

 EARTH DATE 

MAX

AIR

TEMP

°C 

 

MIN

AIR

TEMP

°C

 

AIR

TEMP

RANGE

°C

 

AIR

TEMP

RANGE

°C/40

 

MAX

GROUND

TEMP °C

 

MIN

GROUND

TEMP °C

 

∆ GROUND

TEMP

DAY

TO

NIGHT

 

DAYTIME

CHANGE

IN TEMP 

°C AIR

TO GROUND

 

NIGHTTIME

CHANGE

IN TEMP

°C AIR TO

GROUND

 PRESSURE AT SAME   LS IN MSL  YEAR 2  ∆ PRESSURE YEAR  2 TO YEAR 3 SAME LS  ~LS Year 2 

PRESSURE YEAR 2 BEFORE REVISION 

 		 UV YR 3 

UV YR   2(1011)

 

 

Figure 1 - Sol 1553 to 1554 temperature and pressure anomalies and JPL fix after we highlighted the problem with Sol 1554 pressure and max temperatures.

 

Figure 2 - REMS report for Sol 1575.

 

Figure 3 - The 35 Pa pressure drop and warm low temperatures on Sol 1605 was altered as predicted.

 

Figure 4 – As predicted, odd data for Sol 1610 was altered – in this case totally deleted.

 

Figure 5 - The ground temperature drop for Sol 1640 was not revised. This marked the beginning of strangely cold temperatures that went unchanged.

 

Figure 6 - Insane variation in night air to ground temperatures between MSL Sols 1643 and 1650.

       What was the length of daylight hours at MSL when a record ground temperature low of -110° C was recorded at Ls 340? The REMS report indicated a sunrise at 06:46 and a sunset at 18:52. That’s 12 hours 6 minutes. REMS did not post correct times until after we had proven their partner (Ashima Research) posted times that are totally bogus (in fact, impossible). We posted all the correct times at http://davidaroffman.com/photo4_26.html. REMS then matched them, and Ashima Research went on to take down their site. The David Roffman calculation for Ls 340 is given below. It shows a daylength of 12 hours 6.98 minutes, less than a minute off of the REMS post (which rounds off sunrise and sunset times to the nearest minute). Table 4 shows the spreadsheet calculation we used for Ls 340. 

A

B

C

D

E

F

G

H

I

J

K

Λsun (270 to 359 is summer in southern hemisphere)

This is Ls.

Latitude (phi)

δdegrees =  arcsin((sin(25.19)*sin(λsun))

H = arccos((SIN(-.17) - SIN(lw)*SIN(δ))/(COS(lw)*COS(δ))

Day Length =2*1.027491*H/360

Daylight in Hours David’s Calculation (E Value*24)

Half Sol in Hours

Difference Half day – Daylight (G-F)

Minutes above or below 12 hours for daylight

Hours of daylight

Plus minutes

340

-4.59

-8.370350533

90.84922794

0.518593134

12.44623521

12.329895

0.11634

6.98041177

12 hr

6.98041177