<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 12:10:00.000"
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="14.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, 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" >
2026.10.24 (297) 12:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710241210009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.023" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.806" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.183" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.853" 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="3.145" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.245" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="323.918" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="175.934" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.822" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.980" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="99.521" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="53.866" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.848" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.315" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.070" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="71">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.833 361.667 362.500 363.333 364.167 365.000 365.000 366.364 367.727 369.091 370.455 371.818 373.182 374.545 375.909 377.273 378.636 380.000 381.364 382.727 384.091 385.455 386.818 388.182 389.545 390.909 392.273 393.636 395.000 396.364 397.727 399.091 400.455 401.818 403.182 404.545 405.909 407.273 408.636 410.000 411.364 412.727 414.091 415.455 416.818 418.182 419.545 420.909 422.273 423.636 425.000 430.000 432.701 435.853 439.581 444.057 449.532 456.382 465.201 476.978 493.503 518.372 560.039
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 42 0 0 0 57 54 54 0 60 57 45 45 0 45 45 42 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -2.734375 0.390625 -0.390625 0.390625 -1.171875 1.171875 0.390625 -1.171875 -2.734375 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 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="12">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 230.000 235.000 240.000 245.000 250.000 250.000 260.000 270.000 275.000 280.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 48 0 0 0 0 0 0 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 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="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.521 90.0 95.0 100.0 105.0 110.0 112.58 115.0 115.16 117.74 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.934 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 323.918 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.115 2.722 3.043 3.145 3.023 3.023 3.023 3.145 3.256 3.485 3.702 3.903 4.087 4.255 4.409 4.553 4.689 4.819 4.94 5.02 5.023 5.255 5.499 5.715 5.913 6.099 6.277 6.449 6.618 6.786 6.953 7.121 7.291 7.464 7.642 7.825 8.014 8.212 8.418 8.634 8.861 9.096 9.335 9.571 9.791 9.985 10.143 10.262 10.344 10.389 10.4 10.4 10.391 10.371 10.34 10.298 10.247 10.187 10.119 10.042 9.958 9.867 9.771 9.668 9.561 9.448 9.332 9.211 9.088 8.961 8.832 8.701 8.568 8.433 8.297 8.161 8.023 7.885 7.747 7.609 7.472 7.334 7.197 7.061 6.926 6.792 6.659 6.527 6.396 6.267 6.139 6.013 5.888 5.766 5.644 5.525 5.407 5.291 5.177 5.065 4.955 4.846 4.74 4.635 4.532 4.432 4.333 4.235 4.14 4.047 3.955 3.865 3.777 3.691 3.607 3.524 3.443 3.364 3.286 3.21 3.136 3.063 2.992 2.922 2.854 2.788 2.722 2.659 2.596 2.536 2.476 2.418 2.361 2.305 2.251 2.198 2.146 2.095 2.046 1.997 1.95 1.904 1.859 1.814 1.771 1.729 1.688 1.648 1.609 1.571 1.533 1.497 1.461 1.426 1.392 1.359 1.327 1.295 1.264 1.234 1.204 1.176 1.148 1.12 1.093 1.067 1.042 1.017 0.992 0.969 0.946 0.923 0.901 0.879 0.858 0.838 0.818 0.798 0.779 0.76 0.742 0.724 0.707 0.69 0.673 0.657 0.642

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.145" PeakHeight="110.0" Num="3" Error="0.0">
-30.314 12.876 -3.041
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.145" EndFrequency="5.023" PeakHeight="175.934" Num="5" Error="0.0">
-49.347 -13.555 6.269 -1.953 0.392
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.023" EndFrequency="10.4" PeakHeight="323.918" Num="5" zHalfNm="236.822" Error="6.33">
-125.917 -27.637 1.13 5.77 -1.33
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.74" Depth="0.122"/>
<TopsideChapman PeakHeight="323.918" PeakDensity="1341935.5" PeakScaleHeight="64.315" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
