<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 21:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.15 (046) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202604602152140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.526" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.621" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.637" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="406.434" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="337.849" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.032" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.728" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.438" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.691" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="139">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 310.000 310.556 311.111 311.667 312.222 312.778 313.333 313.889 314.444 315.000 316.667 318.333 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 331.250 332.500 333.750 335.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 341.667 343.333 345.000 345.000 345.000 345.000 345.000 350.000 351.667 353.333 355.000 356.667 358.333 360.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 372.500 375.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 386.667 388.333 390.000 395.000 395.000 395.000 395.000 395.000 400.000 402.500 405.000 407.500 410.000 412.000 414.000 416.000 418.000 420.000 420.000 421.667 423.333 425.000 430.000 432.692 435.385 438.077 440.769 443.462 446.154 448.846 451.538 454.231 456.923 459.615 462.308 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 490.000 495.000 495.000 495.000 500.000 503.333 506.667 510.000 510.000 515.000 520.000 522.500 525.000 525.000 530.000 530.000 535.000 539.758 545.554 552.769 561.999
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 54 0 0 0 0 0 0 0 0 0 66 0 0 0 0 0 0 69 66 75 72 72 69 0 0 0 0 60 57 0 0 0 63 0 0 0 0 0 0 66 0 0 66 0 0 0 0 0 51 63 0 75 0 0 0 0 63 0 0 0 0 69 57 0 0 57 0 0 63 0 0 0 60 0 66 69 66 69 0 0 0 54 0 0 0 0 54 57 0 0 54 54 0 0 0 0 0 0 0 0 0 48 0 0 45 54 48 54 54 60 57 60 54 48 51 54 51 54 51 54 0 0 54 57 0 60 0 63 63 60 57 60 60 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -1.953125 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 1.953125 1.953125 -1.953125 -0.390625 -2.734375 -2.734375 1.171875 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.964 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.974 140.0 145.0 150.0 155.0 160.0 161.947 165.0 170.0 175.0 180.0 185.0 187.921 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 406.434 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.422 0.552 0.617 0.637 0.628 0.6 0.55 0.472 0.343 0.307 0.307 0.307 0.307 0.307 0.307 0.307 0.346 0.409 0.473 0.536 0.6 0.637 0.7 0.804 0.896 0.986 1.081 1.181 1.291 1.412 1.546 1.696 1.864 2.051 2.257 2.48 2.717 2.965 3.218 3.475 3.732 3.989 4.244 4.498 4.749 4.999 5.247 5.494 5.74 5.984 6.229 6.473 6.716 6.96 7.203 7.446 7.688 7.929 8.166 8.399 8.623 8.834 9.024 9.182 9.294 9.347 9.35 9.345 9.324 9.286 9.233 9.165 9.085 8.993 8.891 8.779 8.658 8.53 8.396 8.255 8.11 7.961 7.808 7.653 7.495 7.336 7.176 7.016 6.855 6.695 6.535 6.376 6.219 6.063 5.909 5.757 5.606 5.458 5.313 5.17 5.029 4.891 4.756 4.624 4.494 4.368 4.244 4.123 4.005 3.889 3.777 3.667 3.56 3.456 3.354 3.255 3.159 3.065 2.974 2.885 2.799 2.715 2.634 2.555 2.478 2.403 2.33 2.26 2.191 2.125 2.06 1.998 1.937 1.878 1.82 1.765 1.711 1.659 1.608 1.559 1.511 1.465 1.42 1.376 1.334 1.293 1.253 1.214 1.177 1.141 1.106 1.072 1.039 1.007 0.976 0.946 0.916 0.888 0.861 0.834 0.808 0.783 0.759 0.736 0.713 0.691 0.67 0.649 0.629 0.609 0.591 0.572 0.555 0.538 0.521 0.505 0.489 0.474 0.459 0.445 0.431 0.418 0.405 0.393 0.38 0.369

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.637" PeakHeight="110.0" Num="3" Error="0.0">
-24.069 5.682 -0.649
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.637" EndFrequency="9.35" PeakHeight="406.434" Num="5" zHalfNm="337.849" Error="5.87">
-202.037 -29.733 19.286 -11.98 5.951
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.921" Depth="0.33"/>
<TopsideChapman PeakHeight="406.434" PeakDensity="1084646.4" PeakScaleHeight="49.691" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
