<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 17:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.01 (060) 17:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003011750009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.379" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.030" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.400" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.119" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.232" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="406.704" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.795" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.347" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="164.347" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="71.739" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.577" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="196.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="152">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 258.333 261.667 265.000 268.333 271.667 275.000 275.000 276.667 278.333 280.000 280.000 285.000 290.000 287.500 285.000 290.000 290.000 295.000 300.000 300.000 305.000 305.000 305.000 305.000 307.500 310.000 315.000 320.000 320.000 325.000 327.500 330.000 332.500 335.000 340.000 340.000 340.000 340.000 350.000 350.000 350.000 350.000 350.000 355.000 360.000 362.500 365.000 365.000 365.000 368.333 371.667 375.000 370.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 392.500 395.000 395.000 397.500 400.000 395.000 397.500 400.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 447.500 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 462.000 464.000 466.000 468.000 470.000 470.000 473.333 476.667 480.000 480.000 480.000 480.000 480.000 485.000 485.000 485.000 495.000 495.000 497.500 500.000 505.000 510.000 515.000 518.000 521.000 524.000 527.000 530.000 535.000 538.333 541.667 545.000 550.000 550.000 557.500 565.000 570.000 580.000 585.000 592.500 600.000 607.500 617.975 629.724 642.994 658.099 675.450 695.588 719.242
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 45 0 0 0 51 45 0 0 57 54 60 0 0 57 63 60 0 48 57 45 57 60 57 0 48 51 48 48 45 0 0 0 51 45 57 0 60 45 0 63 54 63 0 60 0 54 63 66 0 0 48 60 45 54 63 66 69 63 66 69 69 72 0 66 72 0 66 72 60 69 57 63 63 66 63 66 69 66 69 63 69 66 66 69 63 51 57 63 54 60 66 54 63 48 63 63 66 60 63 63 0 0 0 0 60 63 0 0 51 0 57 48 48 54 54 0 51 54 0 51 51 45 42 0 0 0 0 45 42 0 0 48 48 48 0 51 51 45 48 0 48 0 51 51 48 0 0 45 42
</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 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 2.734375 0.390625 -0.390625 0.390625 0.390625 1.953125 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 1.171875 1.953125 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
</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" >
89.526 90.0 95.0 100.0 105.0 110.0 112.692 115.0 115.384 118.076 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 406.704 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.097 2.7 3.018 3.119 2.997 2.997 2.997 3.119 3.169 3.301 3.435 3.572 3.711 3.853 3.998 4.145 4.295 4.447 4.602 4.76 4.919 5.082 5.246 5.412 5.58 5.75 5.922 6.095 6.27 6.446 6.623 6.802 6.982 7.162 7.344 7.526 7.709 7.893 8.078 8.263 8.448 8.634 8.821 9.007 9.193 9.38 9.566 9.751 9.936 10.12 10.302 10.482 10.66 10.835 11.006 11.172 11.331 11.484 11.627 11.76 11.879 11.983 12.069 12.134 12.178 12.199 12.2 12.198 12.19 12.175 12.152 12.124 12.089 12.048 12.002 11.95 11.893 11.832 11.765 11.695 11.62 11.541 11.459 11.373 11.284 11.192 11.097 11.0 10.9 10.798 10.694 10.589 10.481 10.372 10.262 10.151 10.038 9.925 9.811 9.696 9.581 9.465 9.349 9.233 9.117 9.001 8.885 8.769 8.653 8.537 8.422 8.308 8.193 8.08 7.967 7.855 7.743 7.632 7.522 7.413 7.305 7.198 7.091 6.986 6.881 6.778 6.675 6.574 6.474 6.374 6.276 6.179 6.083 5.988 5.895 5.802 5.711 5.62 5.531 5.443 5.357 5.271 5.186 5.103 5.02 4.939 4.859 4.78 4.702 4.626 4.55 4.476 4.402 4.33 4.258 4.188 4.119 4.051 3.984 3.917 3.852 3.788 3.725 3.663 3.602 3.541 3.482 3.424 3.366 3.31 3.254 3.199 3.145 3.092 3.04 2.989 2.938 2.888 2.839 2.791 2.744 2.697 2.652 2.606 2.562 2.519

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.119" PeakHeight="110.0" Num="3" Error="0.0">
-30.293 12.846 -3.027
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.119" EndFrequency="12.2" PeakHeight="406.704" Num="5" zHalfNm="284.795" Error="3.235">
-253.133 -47.944 15.669 -3.888 0.668
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.076" Depth="0.122"/>
<TopsideChapman PeakHeight="406.704" PeakDensity="1846650.1" PeakScaleHeight="89.577" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
