<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.11 (042) 20:40:00</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">
FF202604202112040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.597" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.401" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="1.813" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="370.230" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="282.853" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.323" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.497" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.737" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.790" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="132.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" 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" >
2.75 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 255.000 260.000 261.250 262.500 263.750 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 280.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 276.250 277.500 278.750 280.000 285.000 285.000 285.000 286.250 287.500 288.750 290.000 290.000 290.000 291.667 293.333 295.000 295.000 295.000 297.500 300.000 302.500 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 312.500 315.000 315.000 320.000 320.000 322.500 325.000 325.000 325.000 327.500 330.000 331.667 333.333 335.000 335.000 335.000 335.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 366.250 367.500 368.750 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 427.500 430.000 430.000 435.000 435.000 437.500 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 460.000 460.000 462.500 465.000 470.000 475.000 475.000 480.000 485.000 490.000 490.000 490.000 495.000 499.468 504.615 510.606 517.668 526.117 536.405 549.207 565.573 587.231
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 60 0 0 0 57 60 57 48 63 63 66 66 66 66 48 69 0 69 0 0 57 60 51 0 0 0 63 69 0 66 0 0 0 66 66 66 0 0 66 66 66 0 0 48 51 57 0 0 0 66 66 63 0 66 54 66 0 69 69 63 66 0 57 63 66 0 60 0 51 57 63 0 69 60 0 54 60 66 66 60 0 72 69 66 69 63 66 60 0 0 0 63 69 63 69 60 66 72 63 69 60 69 60 66 66 63 69 60 69 69 66 69 60 66 66 63 69 60 66 54 66 69 60 63 57 66 69 63 69 60 66 63 63 60 66 0 63 60 57 63 60 57 51 60 57 57 57 54 54 54 54 45 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 1.953125 -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 -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 1.953125 -1.953125 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 2.734375 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -2.734375 2.734375 -2.734375
</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" >
89.818 90.0 95.0 100.0 105.0 110.0 115.0 119.275 120.0 125.0 128.551 130.0 135.0 137.826 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.23 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.214 1.57 1.755 1.813 1.774 1.676 1.676 1.676 1.676 1.697 1.771 1.813 1.864 1.978 2.088 2.199 2.312 2.43 2.553 2.683 2.821 2.969 3.129 3.3 3.485 3.683 3.896 4.122 4.359 4.605 4.858 5.114 5.371 5.627 5.881 6.132 6.379 6.622 6.862 7.097 7.329 7.558 7.783 8.006 8.226 8.443 8.657 8.869 9.077 9.282 9.483 9.677 9.864 10.04 10.201 10.341 10.451 10.523 10.55 10.55 10.544 10.526 10.496 10.455 10.403 10.342 10.271 10.192 10.106 10.012 9.911 9.805 9.693 9.576 9.454 9.329 9.2 9.068 8.933 8.797 8.658 8.518 8.376 8.234 8.091 7.948 7.804 7.661 7.518 7.375 7.233 7.092 6.952 6.814 6.676 6.54 6.405 6.272 6.14 6.01 5.882 5.755 5.631 5.508 5.388 5.269 5.152 5.037 4.924 4.814 4.705 4.598 4.493 4.39 4.29 4.191 4.094 3.999 3.906 3.815 3.726 3.638 3.553 3.469 3.387 3.307 3.229 3.152 3.077 3.004 2.932 2.862 2.794 2.727 2.662 2.598 2.535 2.474 2.415 2.356 2.3 2.244 2.19 2.137 2.085 2.035 1.985 1.937 1.89 1.844 1.799 1.755 1.713 1.671 1.63 1.591 1.552 1.514 1.477 1.441 1.406 1.372 1.338 1.305 1.273 1.242 1.212 1.182 1.153 1.125 1.098 1.071 1.044 1.019 0.994 0.97 0.946 0.923 0.9 0.878 0.856 0.835 0.815 0.795 0.775 0.756

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.813" PeakHeight="110.0" Num="3" Error="0.0">
-28.757 10.704 -2.129
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.813" EndFrequency="10.55" PeakHeight="370.23" Num="5" zHalfNm="282.853" Error="4.171">
-202.688 -37.225 13.603 -10.35 4.256
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.826" Depth="0.137"/>
<TopsideChapman PeakHeight="370.23" PeakDensity="1380924.4" PeakScaleHeight="62.79" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
