<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 11:00:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.09 (068) 11:00:00</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">
FF202606803091100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.015" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.013" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.550" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.710" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="106.960" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.935" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.759" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="375.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.668" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="299.151" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.527" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.017" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.750" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="98.312" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.510" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.664" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="119.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.800" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="124">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
265.000 265.000 265.000 267.500 270.000 270.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.556 281.111 281.667 282.222 282.778 283.333 283.889 284.444 285.000 285.000 285.000 285.000 285.000 287.500 290.000 291.111 292.222 293.333 294.444 295.556 296.667 297.778 298.889 300.000 301.250 302.500 303.750 305.000 300.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 326.250 327.500 328.750 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 379.029 383.467 388.378 393.843 399.961 406.856 414.688 423.659 434.039 446.187 460.598 477.969 499.315
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 57 0 0 0 60 60 60 54 63 60 63 0 57 54 51 60 0 0 54 51 57 51 48 48 57 0 0 0 0 0 0 0 0 51 0 0 0 51 0 54 0 0 0 0 0 0 0 0 45 0 0 0 48 60 57 63 48 51 57 63 63 54 60 63 66 66 0 66 60 63 60 54 60 0 51 0 60 63 63 60 60 60 60 57 63 63 60 57 45 63 63 66 63 66 66 63 66 66 60 66 57 63 54 60 60 60 60 0 0 0 0 48 51 51 45 48 45 45 45 45 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 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 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
106.960 107.931 109.058 110.408 112.104
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 60 0 54 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -0.390625 -0.390625 1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="57">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 108.333 106.667 105.000 110.000 110.000 107.500 105.000 105.000 105.000 105.000 105.000 105.000 110.000 108.333 106.667 105.000 105.000 105.000 115.000 120.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 116.250 117.500 118.750 120.000 117.500 115.000 115.000 115.000 115.000 112.500 110.000 115.000 113.750 112.500 111.250 110.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 57 60 0 66 0 0 72 63 57 0 72 72 75 75 72 69 66 0 0 69 63 60 57 48 72 72 0 0 63 0 66 63 54 60 63 0 0 0 54 57 60 60 57 51 0 48 51 0 0 0 0 45 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 -1.171875 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
</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" >
90.0 95.0 98.935 100.0 103.694 105.0 108.452 110.0 113.211 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 299.151 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.419 2.71 2.704 2.585 2.585 2.585 2.626 2.71 2.799 3.021 3.222 3.412 3.597 3.781 3.964 4.148 4.335 4.525 4.719 4.919 5.123 5.334 5.551 5.776 6.009 6.25 6.501 6.76 7.029 7.307 7.594 7.89 8.192 8.499 8.807 9.114 9.415 9.703 9.974 10.221 10.44 10.624 10.77 10.874 10.934 10.95 10.95 10.938 10.91 10.866 10.807 10.735 10.65 10.554 10.448 10.332 10.207 10.075 9.936 9.79 9.64 9.485 9.326 9.163 8.998 8.831 8.662 8.492 8.322 8.151 7.98 7.809 7.639 7.47 7.303 7.136 6.972 6.809 6.648 6.489 6.333 6.179 6.027 5.878 5.731 5.587 5.446 5.307 5.171 5.038 4.908 4.78 4.655 4.533 4.413 4.297 4.182 4.071 3.962 3.856 3.752 3.651 3.552 3.456 3.362 3.271 3.182 3.095 3.01 2.928 2.847 2.769 2.693 2.619 2.546 2.476 2.407 2.341 2.276 2.213 2.151 2.092 2.033 1.977 1.922 1.868 1.816 1.765 1.716 1.668 1.622 1.576 1.532 1.489 1.448 1.407 1.368 1.329 1.292 1.256 1.221 1.186 1.153 1.121 1.089 1.059 1.029 1.0 0.972 0.945 0.918 0.892 0.867 0.843 0.819 0.796 0.774 0.752 0.731 0.71 0.69 0.671 0.652 0.634 0.616 0.598 0.582 0.565 0.549 0.534 0.519 0.504 0.49 0.476 0.463 0.45 0.437 0.425 0.413 0.401 0.39 0.379 0.368 0.358 0.348 0.338 0.328

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.71" PeakHeight="98.935" Num="3" Error="3.19">
-13.109 5.396 -1.222
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.71" EndFrequency="10.95" PeakHeight="299.151" Num="5" zHalfNm="227.527" Error="3.074">
-161.149 -31.466 3.539 3.23 -0.094
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.276" Depth="0.125"/>
<TopsideChapman PeakHeight="299.151" PeakDensity="1487624.1" PeakScaleHeight="54.664" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
