<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 19:50:00.000"
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" >
2026.03.09 (068) 19:50:00</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">
FF202606803091950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.510" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.247" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="11.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.379" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.001" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="288.631" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.698" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.818" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.606" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.552" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="185">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 230.000 230.000 235.000 235.000 237.500 240.000 245.000 250.000 250.000 250.000 250.000 250.000 255.000 256.667 258.333 260.000 261.667 263.333 265.000 260.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 290.000 291.250 292.500 293.750 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 302.500 305.000 306.500 308.000 309.500 311.000 312.500 314.000 315.500 317.000 318.500 320.000 320.000 322.500 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 407.500 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 432.000 434.000 436.000 438.000 440.000 440.000 440.000 445.000 447.500 450.000 450.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 470.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 495.000 497.500 500.000 500.000 510.000 510.000 510.000 510.000 510.000 517.500 525.000 532.500 540.000 540.000 546.667 553.333 560.000 560.000 575.000 580.000 589.659 600.641 613.236
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 60 54 63 57 0 60 0 54 0 60 60 57 57 0 0 51 0 0 0 60 66 63 0 63 0 0 63 63 60 0 0 66 0 60 0 0 0 0 0 51 57 0 0 0 57 63 0 51 0 63 0 0 0 63 0 0 0 0 0 0 0 66 51 57 66 0 57 0 69 57 0 69 60 66 54 60 66 57 0 66 66 66 54 63 69 60 66 69 66 69 63 69 60 69 69 63 69 60 66 60 63 54 60 66 69 63 66 57 0 51 57 60 66 66 63 63 69 0 66 66 63 63 66 66 66 63 60 66 63 0 0 0 0 60 63 63 60 0 54 0 60 60 57 60 57 57 57 54 60 57 57 54 0 48 54 48 51 48 0 54 54 0 57 54 45 54 57 0 0 0 54 0 42 54 45 0 48 45 42 48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.666 90.0 95.0 100.0 105.0 110.0 115.0 116.196 120.0 122.393 125.0 128.589 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.001 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.228 1.597 2.06 2.302 2.379 2.297 2.253 2.253 2.253 2.306 2.379 2.414 2.537 2.664 2.794 2.929 3.071 3.219 3.375 3.54 3.714 3.897 4.089 4.291 4.501 4.718 4.942 5.171 5.404 5.64 5.877 6.114 6.351 6.587 6.822 7.055 7.287 7.517 7.745 7.972 8.197 8.42 8.643 8.864 9.084 9.303 9.522 9.74 9.957 10.174 10.39 10.605 10.819 11.032 11.243 11.45 11.652 11.845 12.025 12.186 12.318 12.409 12.449 12.45 12.446 12.43 12.403 12.365 12.316 12.257 12.19 12.113 12.029 11.937 11.838 11.733 11.621 11.505 11.383 11.256 11.126 10.992 10.854 10.714 10.57 10.425 10.278 10.129 9.979 9.828 9.676 9.524 9.371 9.218 9.066 8.913 8.761 8.61 8.459 8.309 8.161 8.013 7.866 7.721 7.578 7.435 7.295 7.155 7.018 6.882 6.748 6.616 6.486 6.357 6.231 6.106 5.983 5.862 5.743 5.626 5.511 5.398 5.287 5.177 5.07 4.964 4.861 4.759 4.659 4.561 4.465 4.37 4.278 4.187 4.098 4.01 3.925 3.841 3.758 3.678 3.599 3.521 3.445 3.371 3.298 3.227 3.157 3.088 3.021 2.955 2.891 2.828 2.766 2.706 2.647 2.589 2.533 2.477 2.423 2.37 2.318 2.267 2.217 2.169 2.121 2.074 2.029 1.984 1.94 1.898 1.856 1.815 1.775 1.736 1.697 1.66 1.623 1.588 1.552 1.518 1.485 1.452 1.42 1.388 1.358 1.328 1.298

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.379" PeakHeight="110.0" Num="3" Error="0.0">
-29.576 11.816 -2.574
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.379" EndFrequency="12.45" PeakHeight="386.001" Num="5" zHalfNm="288.631" Error="4.269">
-221.058 -50.431 22.713 -11.718 3.082
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="18.589" Depth="0.126"/>
<TopsideChapman PeakHeight="386.001" PeakDensity="1923108.0" PeakScaleHeight="69.552" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
