<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 21:10:00.000"
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 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" >
2026.03.10 (069) 21:10:00</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">
FF202606903102110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.403" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.712" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="113.333" Name="h`Es" 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="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.102" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="420.995" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="313.217" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.369" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.200" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="154.184" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.864" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.462" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.060" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.6 10.65 10.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 295.000 296.000 297.000 298.000 299.000 300.000 301.000 302.000 303.000 304.000 305.000 306.000 307.000 308.000 309.000 310.000 311.000 312.000 313.000 314.000 315.000 315.000 317.500 320.000 325.000 325.000 325.000 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 345.000 347.500 350.000 350.000 350.000 355.000 355.000 356.667 358.333 360.000 365.000 365.000 365.000 365.000 365.000 372.500 380.000 375.000 375.000 377.143 379.286 381.429 383.571 385.714 387.857 390.000 392.500 395.000 395.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 542.500 550.000 555.000 565.000 570.000 576.278 583.179 590.802 599.265 608.715 619.336 631.360 645.084 660.897 679.315 701.038
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 75 0 0 0 0 0 0 0 0 0 0 66 60 66 0 72 0 60 0 0 63 63 0 66 51 60 60 0 66 69 0 0 0 51 54 75 75 0 72 72 0 69 0 0 69 0 0 69 69 57 63 60 0 60 63 0 0 60 57 60 63 66 60 0 51 54 63 0 51 0 0 0 0 60 0 60 69 72 72 75 66 69 60 66 72 66 72 66 69 72 75 66 69 69 66 69 63 69 66 57 66 60 60 66 66 69 63 54 54 60 63 69 69 66 69 66 66 0 0 0 0 57 54 54 0 51 51 54 57 54 51 45 45 0 0 45 45 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -2.734375 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -2.734375 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 2.734375 2.734375 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 1.171875 -1.171875 2.734375 -1.171875 -1.171875 2.734375 -1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="54">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.625 111.250 111.875 112.500 113.125 113.750 114.375 115.000 105.000 120.000 120.000 112.500 105.000 110.000 111.000 112.000 113.000 114.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 111.250 112.500 113.750 115.000 120.000 117.500 115.000 120.000 120.000 115.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.833 121.667 122.500 123.333 124.167 125.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 0 0 60 0 66 0 0 66 57 66 60 0 60 0 0 0 0 0 0 63 72 0 69 0 0 0 69 69 0 0 0 60 54 0 66 0 0 72 0 0 66 0 0 0 0 0 0 0 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 -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 1.171875 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -1.171875 0.390625 0.390625 1.171875 -0.390625 -0.390625 -0.390625 0.390625 1.171875 -0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.175 95.0 100.0 105.0 110.0 115.0 120.0 125.0 125.134 130.0 135.0 140.0 140.268 145.0 150.0 155.0 155.402 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 420.995 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.734 0.955 1.067 1.102 1.083 1.025 0.922 0.919 0.919 0.919 0.919 0.919 0.976 1.037 1.097 1.102 1.212 1.321 1.43 1.54 1.656 1.778 1.908 2.049 2.2 2.365 2.544 2.739 2.948 3.171 3.407 3.654 3.909 4.169 4.432 4.696 4.959 5.221 5.479 5.735 5.987 6.235 6.48 6.72 6.958 7.191 7.42 7.646 7.868 8.085 8.298 8.507 8.71 8.909 9.101 9.287 9.466 9.638 9.8 9.953 10.095 10.225 10.342 10.445 10.531 10.601 10.653 10.686 10.7 10.7 10.697 10.687 10.669 10.643 10.611 10.572 10.526 10.475 10.417 10.355 10.287 10.215 10.138 10.057 9.973 9.884 9.793 9.698 9.601 9.501 9.399 9.294 9.188 9.081 8.971 8.861 8.749 8.637 8.524 8.41 8.295 8.181 8.066 7.951 7.836 7.721 7.606 7.492 7.379 7.265 7.153 7.04 6.929 6.819 6.709 6.6 6.492 6.385 6.279 6.175 6.071 5.968 5.867 5.766 5.667 5.569 5.473 5.377 5.283 5.19 5.098 5.008 4.919 4.831 4.744 4.659 4.575 4.492 4.41 4.33 4.251 4.173 4.097 4.021 3.947 3.874 3.803 3.732 3.663 3.594 3.527 3.462 3.397 3.333 3.271 3.209 3.149 3.089 3.031 2.974 2.917 2.862 2.808 2.755 2.702 2.651 2.6 2.551 2.502 2.455 2.408 2.362 2.316 2.272 2.229 2.186 2.144 2.103 2.062 2.023 1.984 1.946 1.908 1.872 1.836 1.8

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.102" PeakHeight="110.0" Num="3" Error="0.0">
-26.931 8.466 -1.36
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.102" EndFrequency="10.7" PeakHeight="420.995" Num="5" zHalfNm="313.217" Error="4.943">
-267.164 -0.89 5.996 -7.358 3.823
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="45.402" Depth="0.183"/>
<TopsideChapman PeakHeight="420.995" PeakDensity="1420471.5" PeakScaleHeight="79.462" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
