<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 17:10:00.000"
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 1 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.02 (061) 17:10:00</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">
FF202606103021710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="12.575" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.372" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.522" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.645" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.247" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.293" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="381.376" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="183.760" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.710" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.146" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.197" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="59.348" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="67.177" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.457" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="173.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.240" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="144">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.5 12.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 313.333 316.667 320.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 330.000 330.000 333.333 336.667 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 432.500 435.000 435.000 435.000 440.000 441.667 443.333 445.000 446.250 447.500 448.750 450.000 450.000 451.000 452.000 453.000 454.000 455.000 460.000 462.000 464.000 466.000 468.000 470.000 470.000 475.000 480.000 485.000 490.000 490.000 490.000 495.000 495.000 500.000 505.000 510.000 510.000 520.000 510.000 515.000 535.000 540.000 546.524 553.692 561.605 570.385 580.184 591.189 603.637 617.832 634.171 653.177
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 63 54 51 57 54 51 63 60 63 63 60 48 0 0 54 51 0 0 0 48 0 51 51 45 0 0 57 57 63 60 57 60 57 54 57 0 57 57 66 66 63 66 66 63 60 0 57 63 0 60 60 60 66 63 0 57 0 63 57 54 0 54 60 51 57 48 54 66 69 72 66 63 48 57 63 0 63 63 60 60 66 66 63 60 54 0 51 0 51 48 48 0 48 42 48 51 0 0 51 0 0 0 48 48 0 0 0 0 42 45 0 0 42 0 0 0 0 48 42 42 54 57 51 54 54 51 51 45 48 0 0 51 45 0 45 54 48 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 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -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 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 2.734375 0.390625 1.171875 1.171875 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 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 2.734375 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 260.000 265.000 269.167 273.333 277.500 281.667 285.833 290.000 295.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 60 57 0 48 0 0 0 54 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 -1.953125 0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.505 90.0 95.0 100.0 105.0 110.0 112.144 114.289 115.0 116.433 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.76 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 381.376 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.184 2.81 3.141 3.247 3.125 3.125 3.165 3.247 3.408 3.633 3.856 4.063 4.248 4.413 4.562 4.699 4.828 4.952 5.073 5.194 5.315 5.372 5.418 5.594 5.761 5.924 6.085 6.248 6.413 6.583 6.757 6.937 7.123 7.317 7.518 7.727 7.942 8.165 8.392 8.624 8.858 9.094 9.328 9.561 9.79 10.015 10.236 10.452 10.662 10.868 11.067 11.261 11.448 11.629 11.803 11.967 12.12 12.259 12.38 12.477 12.543 12.573 12.575 12.572 12.561 12.539 12.509 12.471 12.424 12.37 12.309 12.24 12.166 12.085 11.998 11.907 11.81 11.709 11.603 11.494 11.381 11.264 11.145 11.023 10.898 10.771 10.643 10.512 10.38 10.247 10.113 9.978 9.842 9.706 9.57 9.433 9.296 9.159 9.023 8.886 8.751 8.615 8.481 8.347 8.214 8.082 7.951 7.821 7.692 7.564 7.438 7.312 7.188 7.065 6.944 6.824 6.706 6.588 6.473 6.359 6.246 6.135 6.025 5.917 5.81 5.705 5.602 5.5 5.399 5.301 5.203 5.107 5.013 4.92 4.829 4.739 4.65 4.563 4.478 4.394 4.311 4.23 4.15 4.071 3.994 3.918 3.844 3.771 3.699 3.628 3.559 3.491 3.424 3.358 3.294 3.23 3.168 3.107 3.047 2.989 2.931 2.874 2.819 2.764 2.71 2.658 2.606 2.556 2.506 2.457 2.41 2.363 2.317 2.272 2.227 2.184 2.141 2.1 2.059 2.018 1.979 1.94 1.902 1.865 1.829 1.793 1.758

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.247" PeakHeight="110.0" Num="3" Error="0.0">
-30.394 12.994 -3.095
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.247" EndFrequency="5.372" PeakHeight="183.76" Num="5" Error="0.0">
-55.247 -19.207 10.118 -3.642 0.651
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.372" EndFrequency="12.575" PeakHeight="381.376" Num="5" zHalfNm="275.71" Error="6.504">
-165.658 -36.669 6.586 -4.169 2.294
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.433" Depth="0.122"/>
<TopsideChapman PeakHeight="381.376" PeakDensity="1961918.4" PeakScaleHeight="78.457" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
