<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 11:30:00.000"
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 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) 11:30:00</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">
FF202606003011130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.692" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.726" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.500" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.850" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.960" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.812" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="106.429" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.846" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="327.303" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.145" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.147" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="121.293" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.873" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.858" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="148.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.050" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 225.000 227.500 230.000 230.000 235.000 237.500 240.000 240.000 245.000 245.000 250.000 250.000 255.000 255.000 255.000 255.000 260.000 265.000 266.000 267.000 268.000 269.000 270.000 270.000 272.500 275.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 286.429 287.857 289.286 290.714 292.143 293.571 295.000 296.667 298.333 300.000 301.667 303.333 305.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 312.500 315.000 315.000 315.000 320.000 320.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 470.000 470.000 475.000 479.103 484.093 490.294 498.206 508.653 523.083 544.312
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 54 0 0 0 0 0 54 63 57 54 54 51 48 0 48 63 57 54 0 0 51 0 60 54 0 60 57 0 63 60 60 57 0 63 0 0 0 0 0 0 45 0 48 0 0 0 54 57 60 60 69 0 60 63 0 66 63 63 69 63 0 45 54 66 54 60 60 57 60 60 66 57 63 57 63 57 60 60 69 72 72 66 69 66 69 69 72 69 66 63 60 63 57 66 66 63 63 51 54 60 66 69 66 63 66 57 60 57 63 63 60 60 60 57 54 63 63 57 54 54 54 51 54 51
</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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 -1.953125 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 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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.812 102.498 104.801
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
106.429 107.857 109.286 110.714 112.143 113.571 115.000 115.000 115.000 115.294 115.588 115.882 116.176 116.471 116.765 117.059 117.353 117.647 117.941 118.235 118.529 118.824 119.118 119.412 119.706 120.000 115.000 110.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 54 54 57 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 45 54 48 48 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 1.171875 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 -2.734375 -0.390625 0.390625 0.390625 -1.171875 -2.734375 0.390625 2.734375 -0.390625 -1.171875 1.171875 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" >
89.553 90.0 95.0 100.0 105.0 110.0 113.915 115.0 117.831 120.0 121.746 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 327.303 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.99 2.562 2.864 2.96 2.833 2.833 2.833 2.903 2.96 3.061 3.214 3.366 3.521 3.68 3.846 4.018 4.198 4.386 4.581 4.784 4.992 5.205 5.422 5.639 5.857 6.074 6.288 6.5 6.709 6.915 7.118 7.317 7.514 7.707 7.899 8.087 8.274 8.459 8.642 8.823 9.003 9.181 9.357 9.529 9.698 9.859 10.009 10.139 10.239 10.294 10.3 10.298 10.287 10.264 10.231 10.189 10.138 10.078 10.011 9.936 9.854 9.766 9.672 9.572 9.468 9.359 9.247 9.131 9.011 8.889 8.765 8.638 8.51 8.38 8.248 8.116 7.984 7.85 7.717 7.583 7.45 7.317 7.184 7.052 6.921 6.791 6.662 6.533 6.406 6.281 6.156 6.033 5.912 5.792 5.674 5.557 5.442 5.328 5.217 5.107 4.999 4.892 4.788 4.685 4.584 4.484 4.387 4.291 4.197 4.105 4.014 3.926 3.839 3.753 3.67 3.588 3.507 3.429 3.352 3.276 3.202 3.13 3.059 2.99 2.922 2.855 2.79 2.726 2.664 2.603 2.544 2.485 2.428 2.372 2.318 2.265 2.212 2.161 2.111 2.063 2.015 1.968 1.923 1.878 1.835 1.792 1.751 1.71 1.67 1.632 1.594 1.557 1.521 1.485 1.451 1.417 1.384 1.352 1.32 1.289 1.259 1.23 1.201 1.173 1.146 1.119 1.093 1.067 1.042 1.018 0.994 0.971 0.948 0.926 0.905 0.883 0.863 0.843 0.823 0.804 0.785 0.766 0.749 0.731 0.714 0.697

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.96" PeakHeight="110.0" Num="3" Error="0.0">
-30.161 12.653 -2.939
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.96" EndFrequency="10.3" PeakHeight="327.303" Num="5" zHalfNm="234.145" Error="3.814">
-175.345 -42.22 18.107 -8.628 2.529
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.746" Depth="0.127"/>
<TopsideChapman PeakHeight="327.303" PeakDensity="1316253.1" PeakScaleHeight="65.858" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
