<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 21:10:00.000"
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 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2x cusp not found, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.23 (296) 21:10:00</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">
FF202629610232110009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.504" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.662" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="1.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="511.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.636" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="400.817" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="319.012" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.072" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.300" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="118.223" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.298" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.562" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.250" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 306.667 308.333 310.000 310.000 311.250 312.500 313.750 315.000 316.250 317.500 318.750 320.000 320.000 322.500 325.000 325.000 325.000 330.000 330.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 352.500 355.000 355.000 360.000 362.424 364.848 367.273 369.697 372.121 374.545 376.970 379.394 381.818 384.242 386.667 389.091 391.515 393.939 396.364 398.788 401.212 403.636 406.061 408.485 410.909 413.333 415.758 418.182 420.606 423.030 425.455 427.879 430.303 432.727 435.152 437.576 440.000 443.333 446.667 450.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 500.000 505.000 508.333 511.667 515.000 520.000 525.073 530.624 536.725 543.460 550.935 559.279 568.652 579.258 591.355 605.284
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 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 66 45 0 69 69 63 72 66 60 69 66 69 69 63 66 63 66 63 60 51 66 0 0 63 60 0 0 0 0 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.171875 2.734375 -0.390625 -1.171875 1.953125 1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.953125 -2.734375 2.734375 1.953125 -0.390625 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 105.000 105.000 100.000 102.500 105.000 102.500 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 66 69 0 60 0 69 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -1.953125 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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.968 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.988 140.0 145.0 150.0 155.0 160.0 161.975 165.0 170.0 175.0 180.0 185.0 187.963 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 400.817 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.422 0.551 0.616 0.636 0.627 0.599 0.549 0.472 0.344 0.307 0.307 0.307 0.307 0.307 0.307 0.307 0.345 0.409 0.472 0.535 0.598 0.636 0.696 0.808 0.91 1.014 1.123 1.243 1.375 1.524 1.694 1.89 2.114 2.37 2.658 2.974 3.311 3.661 4.016 4.371 4.724 5.07 5.411 5.745 6.071 6.391 6.703 7.008 7.306 7.596 7.877 8.15 8.413 8.665 8.905 9.131 9.342 9.536 9.712 9.866 9.996 10.102 10.18 10.23 10.25 10.25 10.245 10.228 10.198 10.156 10.104 10.041 9.969 9.889 9.8 9.704 9.601 9.492 9.377 9.258 9.134 9.006 8.874 8.74 8.603 8.464 8.323 8.181 8.038 7.894 7.75 7.606 7.461 7.317 7.173 7.03 6.888 6.747 6.608 6.469 6.332 6.197 6.063 5.931 5.8 5.672 5.545 5.42 5.298 5.177 5.058 4.942 4.827 4.715 4.605 4.496 4.39 4.286 4.184 4.085 3.987 3.891 3.797 3.705 3.616 3.528 3.442 3.358 3.276 3.195 3.117 3.04 2.965 2.892 2.821 2.751 2.683 2.616 2.551 2.487 2.425 2.365 2.306 2.248 2.192 2.137 2.083 2.031 1.98 1.93 1.882 1.834 1.788 1.743 1.699 1.656 1.615 1.574 1.534 1.495 1.458 1.421 1.385 1.35 1.316 1.282 1.25 1.218 1.187 1.157 1.128 1.099 1.071 1.044 1.018 0.992 0.967 0.942 0.918 0.895 0.872 0.85 0.828 0.807 0.787 0.767

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.636" PeakHeight="110.0" Num="3" Error="0.0">
-24.059 5.674 -0.647
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.636" EndFrequency="10.25" PeakHeight="400.817" Num="5" zHalfNm="319.012" Error="6.733">
-219.545 7.285 0.291 -4.95 4.065
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.963" Depth="0.329"/>
<TopsideChapman PeakHeight="400.817" PeakDensity="1303505.0" PeakScaleHeight="60.562" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
