<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 20:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.02.03 (034) 20:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603402032040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.339" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.029" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="536.250" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.808" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="422.691" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="306.308" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.322" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="162.039" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.168" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.304" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="176.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 260.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 285.000 287.500 290.000 290.000 300.000 295.000 295.000 295.000 295.000 300.000 305.000 305.909 306.818 307.727 308.636 309.545 310.455 311.364 312.273 313.182 314.091 315.000 315.000 317.500 320.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 337.500 340.000 345.000 346.875 348.750 350.625 352.500 354.375 356.250 358.125 360.000 360.000 360.000 360.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 406.667 408.333 410.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 480.000 480.000 485.000 487.500 490.000 492.500 495.000 495.000 500.000 505.000 505.000 510.000 510.000 510.000 515.000 515.000 520.000 525.000 525.000 528.750 532.500 536.250 540.000 545.000 550.000 555.000 560.000 565.000 570.000 575.000 580.000 590.000 595.000 600.000 608.406 617.604 627.709 638.865 651.244 665.058 680.572 698.121
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 63 60 66 66 63 60 69 66 63 63 63 63 66 63 0 63 60 60 63 57 0 54 0 72 66 0 72 0 66 57 0 0 48 0 0 0 51 0 0 0 0 0 0 0 0 66 69 0 0 0 72 0 72 60 0 69 63 0 54 0 0 60 0 0 60 66 69 69 69 60 69 57 60 54 66 72 66 69 69 69 60 69 63 69 60 69 0 0 69 69 63 57 66 60 69 66 69 66 60 69 66 72 66 57 69 69 66 60 66 69 66 66 63 66 66 66 0 0 0 57 66 63 51 60 54 63 63 60 57 0 60 60 0 60 0 60 0 0 57 57 57 57 57 51 51 51 48 48 0 48 45 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 2.734375 -1.171875 0.390625 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 2.734375 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.82 90.0 95.0 100.0 105.0 110.0 115.0 119.304 120.0 125.0 128.607 130.0 135.0 137.911 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 422.691 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.21 1.566 1.75 1.808 1.769 1.671 1.671 1.671 1.671 1.692 1.765 1.808 1.852 1.955 2.06 2.168 2.281 2.399 2.523 2.655 2.796 2.946 3.106 3.276 3.456 3.645 3.842 4.044 4.251 4.459 4.669 4.877 5.084 5.288 5.49 5.689 5.884 6.076 6.266 6.452 6.636 6.817 6.996 7.173 7.348 7.521 7.692 7.862 8.031 8.198 8.363 8.528 8.691 8.853 9.013 9.172 9.329 9.484 9.636 9.785 9.93 10.07 10.202 10.326 10.438 10.534 10.612 10.667 10.696 10.7 10.699 10.692 10.678 10.657 10.629 10.596 10.556 10.51 10.46 10.404 10.343 10.278 10.208 10.135 10.058 9.977 9.893 9.806 9.716 9.624 9.529 9.433 9.334 9.233 9.131 9.028 8.923 8.817 8.71 8.603 8.494 8.386 8.277 8.167 8.057 7.948 7.838 7.729 7.619 7.51 7.402 7.294 7.186 7.079 6.972 6.867 6.762 6.657 6.554 6.452 6.35 6.249 6.15 6.051 5.953 5.856 5.761 5.666 5.573 5.481 5.389 5.299 5.21 5.123 5.036 4.951 4.866 4.783 4.701 4.62 4.541 4.462 4.385 4.308 4.233 4.159 4.086 4.015 3.944 3.875 3.806 3.739 3.672 3.607 3.543 3.48 3.418 3.357 3.297 3.238 3.179 3.122 3.066 3.011 2.957 2.903 2.851 2.799 2.748 2.698 2.65 2.601 2.554 2.508 2.462 2.417 2.373 2.33 2.287 2.245 2.204 2.164 2.124 2.085 2.047 2.01

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.808" PeakHeight="110.0" Num="3" Error="0.0">
-28.748 10.693 -2.125
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.808" EndFrequency="10.7" PeakHeight="422.691" Num="5" zHalfNm="306.308" Error="5.565">
-262.053 -36.038 23.883 -14.87 4.298
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.911" Depth="0.137"/>
<TopsideChapman PeakHeight="422.691" PeakDensity="1420471.5" PeakScaleHeight="83.304" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
