<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 18:40:00.000"
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" >
2026.02.11 (042) 18:40:00</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">
FF202604202111840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.355" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.140" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="9.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.892" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="407.864" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.420" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.588" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="181.480" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.593" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="99.235" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="210.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 250.000 255.000 260.000 265.000 266.667 268.333 270.000 275.000 280.000 280.000 285.000 290.000 290.000 300.000 300.000 305.000 305.000 310.000 315.000 315.000 320.000 322.500 325.000 325.000 330.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 357.500 360.000 362.500 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 390.000 395.000 390.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 412.500 415.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 480.000 485.000 485.000 490.000 495.000 495.000 495.000 505.000 505.000 510.000 510.000 520.000 520.000 525.000 530.000 530.000 540.000 545.000 550.000 550.000 555.000 565.000 570.000 577.003 584.734 593.313 602.886 613.638 625.799 639.668 655.631 674.201 696.073 722.213 754.007
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 0 45 0 0 54 54 54 54 57 57 51 51 57 51 57 57 54 57 57 0 57 54 60 60 54 60 63 63 63 60 63 63 63 0 60 0 57 60 63 60 63 63 63 0 63 63 66 66 60 66 63 63 60 63 0 63 66 66 63 66 63 66 0 63 60 48 57 63 60 63 63 57 66 63 57 66 63 60 66 63 63 66 63 63 60 66 66 63 66 66 63 63 66 66 63 63 63 63 60 63 63 60 60 60 60 60 57 57 57 54 54 51 51 48 45 45 45 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 2.734375 -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 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
</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" >
89.564 90.0 95.0 100.0 105.0 110.0 113.707 115.0 117.415 120.0 121.122 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 407.864 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.944 2.503 2.798 2.892 2.77 2.77 2.77 2.855 2.892 2.986 3.108 3.232 3.357 3.484 3.613 3.745 3.879 4.015 4.154 4.295 4.439 4.584 4.731 4.88 5.03 5.181 5.333 5.486 5.64 5.794 5.948 6.102 6.256 6.41 6.564 6.717 6.87 7.023 7.175 7.326 7.476 7.625 7.774 7.921 8.068 8.213 8.356 8.498 8.638 8.776 8.912 9.045 9.175 9.301 9.423 9.541 9.653 9.759 9.857 9.947 10.028 10.098 10.156 10.2 10.231 10.248 10.25 10.25 10.245 10.235 10.221 10.203 10.179 10.152 10.121 10.086 10.047 10.005 9.959 9.91 9.858 9.803 9.745 9.685 9.622 9.557 9.49 9.42 9.349 9.276 9.201 9.125 9.047 8.968 8.887 8.806 8.723 8.64 8.556 8.471 8.385 8.299 8.212 8.125 8.037 7.95 7.862 7.774 7.686 7.597 7.509 7.421 7.333 7.245 7.158 7.071 6.984 6.897 6.811 6.725 6.64 6.555 6.471 6.387 6.304 6.221 6.139 6.057 5.976 5.896 5.817 5.738 5.66 5.582 5.506 5.43 5.355 5.28 5.206 5.133 5.061 4.99 4.919 4.849 4.78 4.712 4.644 4.578 4.512 4.447 4.382 4.319 4.256 4.194 4.132 4.072 4.012 3.953 3.895 3.837 3.78 3.724 3.669 3.615 3.561 3.508 3.455 3.404 3.353 3.302 3.253 3.204 3.156 3.108 3.061 3.015 2.969 2.924 2.88 2.836 2.793 2.751 2.709 2.668 2.627 2.587

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.892" PeakHeight="110.0" Num="3" Error="0.0">
-30.103 12.567 -2.9
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.892" EndFrequency="10.25" PeakHeight="407.864" Num="5" zHalfNm="272.42" Error="4.516">
-261.753 -35.449 13.969 -4.563 1.054
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.122" Depth="0.122"/>
<TopsideChapman PeakHeight="407.864" PeakDensity="1303505.0" PeakScaleHeight="99.235" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
