<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 12:00:00.000"
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" >
2026.03.07 (066) 12:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603071200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.643" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.601" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.008" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.178" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="349.041" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.222" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.179" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.061" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.684" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.617" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 257.500 260.000 265.000 267.500 270.000 272.500 275.000 277.500 280.000 282.500 285.000 285.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 303.333 306.667 310.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 337.500 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 397.500 400.000 405.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 445.000 447.500 450.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 490.000 495.000 500.000 506.965 515.200 525.088 537.182 552.313 571.788
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 51 51 0 51 0 0 0 48 0 51 48 0 57 60 0 51 60 57 57 48 0 0 60 0 0 0 63 60 60 57 60 63 60 0 48 54 0 60 66 54 60 60 0 57 57 48 54 60 63 60 60 60 54 60 63 57 60 63 57 63 66 60 63 60 63 63 60 63 54 60 60 57 60 54 60 51 60 51 54 60 63 60 63 57 60 51 57 63 51 60 48 54 60 63 60 60 60 57 54 60 60 57 57 0 54 45 51 54 51 51 51 54 51 51 51 45 48 48 48 0 42 48 0 0 0 0 45
</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 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 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 1.953125 -0.390625 -1.953125 -2.734375 -1.171875 1.171875 -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" >
89.544 90.0 95.0 100.0 105.0 110.0 113.179 115.0 116.359 119.538 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.041 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.022 2.604 2.91 3.008 2.886 2.886 2.886 3.008 3.024 3.187 3.346 3.503 3.659 3.815 3.973 4.133 4.295 4.46 4.627 4.797 4.97 5.146 5.324 5.505 5.688 5.874 6.062 6.252 6.443 6.637 6.832 7.029 7.227 7.427 7.627 7.829 8.033 8.237 8.442 8.648 8.855 9.063 9.271 9.48 9.688 9.894 10.099 10.3 10.495 10.68 10.85 10.997 11.112 11.182 11.2 11.2 11.191 11.171 11.14 11.099 11.048 10.987 10.918 10.841 10.756 10.664 10.566 10.462 10.352 10.238 10.119 9.996 9.87 9.74 9.608 9.473 9.336 9.197 9.057 8.915 8.773 8.63 8.487 8.343 8.2 8.056 7.913 7.771 7.629 7.489 7.349 7.21 7.073 6.936 6.801 6.668 6.536 6.406 6.277 6.15 6.025 5.902 5.78 5.66 5.542 5.426 5.312 5.199 5.089 4.98 4.874 4.769 4.666 4.565 4.466 4.369 4.273 4.179 4.088 3.998 3.909 3.823 3.738 3.655 3.574 3.494 3.416 3.339 3.264 3.191 3.119 3.049 2.98 2.913 2.847 2.783 2.72 2.658 2.598 2.538 2.481 2.424 2.369 2.315 2.262 2.21 2.16 2.111 2.062 2.015 1.969 1.924 1.88 1.836 1.794 1.753 1.713 1.673 1.635 1.597 1.561 1.525 1.49 1.455 1.422 1.389 1.357 1.326 1.295 1.265 1.236 1.207 1.18 1.152 1.126 1.1 1.074 1.049 1.025 1.002 0.978 0.956 0.934 0.912 0.891 0.87

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.008" PeakHeight="110.0" Num="3" Error="0.0">
-30.202 12.712 -2.966
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.008" EndFrequency="11.2" PeakHeight="349.041" Num="5" zHalfNm="257.222" Error="2.035">
-190.324 -53.656 17.208 -3.912 1.181
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.538" Depth="0.122"/>
<TopsideChapman PeakHeight="349.041" PeakDensity="1556327.5" PeakScaleHeight="66.617" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
