<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 18:10:00.000"
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 F2o 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" >
2026.04.03 (093) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609304031810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.456" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.896" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.986" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.167" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="380.223" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="263.041" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.806" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.966" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.853" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.111" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="188.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="144">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.75 10.8 10.85 10.9 10.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 205.000 206.250 207.500 208.750 210.000 210.000 215.000 220.000 225.000 230.000 235.000 240.000 240.000 242.500 245.000 248.000 251.000 254.000 257.000 260.000 265.000 265.000 267.500 270.000 270.000 270.000 275.000 280.000 281.250 282.500 283.750 285.000 290.000 292.500 295.000 295.000 300.000 300.000 305.000 305.000 315.000 315.000 315.000 320.000 321.667 323.333 325.000 327.500 330.000 335.000 335.000 335.000 335.000 337.500 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 357.500 360.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 480.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 525.000 525.000 530.000 540.000 545.000 550.000 555.000 560.000 568.879 579.208 591.374 605.914 623.599 645.572 673.609
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 0 45 45 51 51 51 0 54 54 54 0 48 0 0 0 0 51 48 51 0 54 45 45 54 51 0 51 0 0 57 0 57 0 60 54 63 57 54 60 63 57 0 0 63 48 57 45 0 60 63 0 63 57 63 51 0 66 54 60 0 57 63 51 60 63 51 60 63 54 63 63 57 48 54 60 66 57 63 54 60 51 60 66 69 66 69 66 66 63 66 63 69 63 69 66 69 66 66 66 57 63 57 63 60 54 60 63 63 60 63 60 51 60 63 60 57 60 57 51 42 57 51 54 54 54 51 51 51 51 51 54 54 51 51 48 48 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 -1.953125 -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 -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 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.953125 2.734375 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" >
89.548 90.0 95.0 100.0 105.0 110.0 113.278 115.0 116.555 119.833 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.223 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.007 2.585 2.889 2.986 2.864 2.864 2.864 2.986 2.99 3.126 3.266 3.412 3.563 3.718 3.877 4.039 4.204 4.371 4.54 4.711 4.882 5.054 5.227 5.4 5.573 5.746 5.919 6.092 6.265 6.437 6.61 6.782 6.954 7.125 7.297 7.468 7.639 7.81 7.98 8.151 8.321 8.491 8.66 8.829 8.997 9.164 9.329 9.493 9.655 9.815 9.97 10.121 10.267 10.404 10.532 10.648 10.75 10.833 10.896 10.936 10.95 10.95 10.947 10.936 10.919 10.895 10.865 10.829 10.787 10.74 10.687 10.63 10.568 10.501 10.431 10.356 10.278 10.197 10.113 10.025 9.935 9.842 9.747 9.65 9.551 9.451 9.348 9.245 9.14 9.034 8.927 8.819 8.711 8.602 8.493 8.383 8.274 8.164 8.054 7.944 7.835 7.725 7.617 7.508 7.4 7.292 7.186 7.079 6.974 6.869 6.765 6.662 6.559 6.458 6.357 6.258 6.159 6.062 5.965 5.87 5.775 5.682 5.59 5.499 5.409 5.32 5.232 5.145 5.06 4.976 4.892 4.81 4.729 4.649 4.571 4.493 4.417 4.341 4.267 4.194 4.122 4.051 3.981 3.912 3.844 3.778 3.712 3.647 3.584 3.521 3.46 3.399 3.339 3.281 3.223 3.166 3.111 3.056 3.002 2.949 2.896 2.845 2.795 2.745 2.696 2.648 2.601 2.555 2.509 2.464 2.42 2.377 2.335 2.293 2.252 2.212 2.172 2.133 2.095 2.057 2.02 1.984 1.948 1.913 1.879 1.845

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.986" PeakHeight="110.0" Num="3" Error="0.0">
-30.183 12.685 -2.954
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.986" EndFrequency="10.95" PeakHeight="380.223" Num="5" zHalfNm="263.041" Error="4.029">
-231.3 -42.6 18.13 -5.099 0.479
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.833" Depth="0.122"/>
<TopsideChapman PeakHeight="380.223" PeakDensity="1487624.1" PeakScaleHeight="85.111" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
