<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 13:10:00.000"
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" >
2026.03.23 (082) 13:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608203231310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.618" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.724" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.150" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="125.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="481.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.266" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.303" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="360.341" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.678" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.349" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.500" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="123.851" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.050" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.400" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="158.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.280" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 281.667 283.333 285.000 290.000 292.500 295.000 295.000 295.000 297.143 299.286 301.429 303.571 305.714 307.857 310.000 311.667 313.333 315.000 316.667 318.333 320.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.833 336.667 337.500 338.333 339.167 340.000 340.000 342.500 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 402.500 405.000 407.500 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 427.500 430.000 430.000 430.000 432.500 435.000 436.667 438.333 440.000 440.000 445.000 450.000 450.000 450.000 450.000 452.500 455.000 460.000 465.000 467.500 470.000 475.000 475.000 478.333 481.667 484.811 488.343 492.338 496.894 502.137 508.237 515.422 524.009 534.453 547.430 563.989 585.848 616.040
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 54 51 0 48 57 51 0 0 51 0 0 0 48 0 48 0 0 0 48 60 57 54 60 60 60 60 57 0 60 60 60 63 0 0 45 0 0 66 66 0 66 51 54 60 63 66 57 63 48 54 60 0 69 57 0 69 57 0 66 48 57 60 66 69 66 63 69 69 66 66 0 63 63 66 69 66 63 63 63 60 0 54 63 63 60 0 0 0 51 57 57 60 60 57 57 57 57 51 0 0 57 0 54 57 0 54 0 54 0 54 0 0 51 51 51 45 0 0 51 0 51 48 45 0 48 45 48 0 0 48 48 48 45 48 48 48 54 54 54 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 2.734375 -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 -1.953125 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 51 48 51 51 0 0 0 0 0 0 63 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
</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" >
89.502 90.0 95.0 100.0 105.0 110.0 112.063 114.126 115.0 116.189 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.341 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.197 2.827 3.16 3.266 3.144 3.144 3.196 3.266 3.414 3.593 3.76 3.922 4.08 4.235 4.39 4.544 4.699 4.855 5.012 5.171 5.332 5.495 5.662 5.831 6.004 6.181 6.361 6.545 6.734 6.928 7.126 7.329 7.538 7.752 7.971 8.196 8.426 8.662 8.903 9.149 9.4 9.654 9.911 10.171 10.43 10.688 10.941 11.188 11.425 11.648 11.854 12.038 12.196 12.324 12.419 12.478 12.5 12.5 12.495 12.477 12.448 12.408 12.358 12.297 12.228 12.15 12.064 11.97 11.87 11.763 11.65 11.531 11.408 11.28 11.148 11.012 10.873 10.732 10.587 10.441 10.292 10.142 9.991 9.839 9.686 9.533 9.379 9.225 9.071 8.918 8.765 8.613 8.462 8.311 8.162 8.013 7.866 7.721 7.576 7.433 7.292 7.153 7.015 6.878 6.744 6.612 6.481 6.352 6.225 6.1 5.977 5.856 5.736 5.619 5.504 5.39 5.279 5.169 5.062 4.956 4.852 4.75 4.65 4.552 4.456 4.361 4.269 4.178 4.089 4.001 3.916 3.832 3.749 3.669 3.589 3.512 3.436 3.362 3.289 3.217 3.148 3.079 3.012 2.946 2.882 2.819 2.758 2.697 2.638 2.58 2.524 2.469 2.414 2.361 2.309 2.259 2.209 2.16 2.113 2.066 2.021 1.976 1.933 1.89 1.848 1.807 1.767 1.728 1.69 1.653 1.616 1.58 1.545 1.511 1.478 1.445 1.413 1.382 1.351 1.321 1.292 1.263 1.235 1.208 1.181 1.155

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.266" PeakHeight="110.0" Num="3" Error="0.0">
-30.409 13.016 -3.105
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.266" EndFrequency="12.5" PeakHeight="360.341" Num="5" zHalfNm="268.678" Error="2.415">
-203.862 -51.021 7.717 2.947 0.067
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.189" Depth="0.122"/>
<TopsideChapman PeakHeight="360.341" PeakDensity="1938585.6" PeakScaleHeight="69.4" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
