<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-22 -295 18:00:00.000"
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 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" >
2026.10.22 (295) 18:00:00</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">
FF202629510221800009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.660" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.047" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.949" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.148" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="365.628" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.725" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.146" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.384" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="65.577" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.804" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="147">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.6 12.65 12.7 12.75 12.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 310.000 311.000 312.000 313.000 314.000 315.000 316.000 317.000 318.000 319.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 346.250 347.500 348.750 350.000 351.250 352.500 353.750 355.000 356.250 357.500 358.750 360.000 361.250 362.500 363.750 365.000 366.250 367.500 368.750 370.000 371.250 372.500 373.750 375.000 376.250 377.500 378.750 380.000 381.250 382.500 383.750 385.000 386.250 387.500 388.750 390.000 391.250 392.500 393.750 395.000 396.250 397.500 398.750 400.000 401.250 402.500 403.750 405.000 406.250 407.500 408.750 410.000 411.250 412.500 413.750 415.000 416.250 417.500 418.750 420.000 421.250 422.500 423.750 425.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 460.000 465.000 465.000 475.000 480.000 480.000 485.000 495.000 501.033 508.033 516.252 526.040 537.892 552.539 571.102 595.392 628.545 676.494
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 72 72 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 72 72 75 75 75 72 69 72 72 75 75 72 72 72 72 72 72 72 75 75 75 75 75 78 81 78 78 72 75 78 78 78 75 75 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 45 0 0 0 60 66 57 63 54 60 63 66 60 66 60 66 66 63 66 66 63 63 60 63 63 63 60 60 60 60 57 51 54 0 48 42
</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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 2.734375 0.390625 -0.390625 -1.171875 1.171875 -1.171875 0.390625 2.734375 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 0.390625 0.390625 -2.734375 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 1.171875
</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" >
89.554 90.0 95.0 100.0 105.0 110.0 113.445 115.0 116.89 120.0 120.335 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.628 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.982 2.553 2.853 2.949 2.827 2.827 2.827 2.937 2.949 3.131 3.323 3.511 3.694 3.874 4.051 4.226 4.4 4.574 4.747 4.922 5.098 5.275 5.455 5.638 5.824 6.014 6.208 6.407 6.611 6.822 7.038 7.262 7.494 7.734 7.982 8.24 8.506 8.782 9.067 9.359 9.658 9.96 10.262 10.561 10.852 11.131 11.394 11.637 11.859 12.057 12.232 12.383 12.509 12.612 12.693 12.751 12.786 12.8 12.8 12.796 12.781 12.756 12.721 12.676 12.623 12.562 12.493 12.416 12.332 12.242 12.145 12.043 11.936 11.824 11.708 11.587 11.463 11.335 11.205 11.072 10.936 10.798 10.658 10.517 10.374 10.231 10.086 9.941 9.795 9.649 9.503 9.357 9.211 9.066 8.921 8.776 8.633 8.49 8.348 8.207 8.067 7.929 7.791 7.655 7.521 7.387 7.256 7.125 6.997 6.869 6.744 6.62 6.498 6.377 6.258 6.141 6.026 5.912 5.8 5.689 5.581 5.474 5.369 5.265 5.163 5.063 4.965 4.868 4.773 4.679 4.587 4.497 4.408 4.321 4.236 4.152 4.069 3.988 3.909 3.831 3.754 3.679 3.605 3.533 3.462 3.392 3.324 3.257 3.191 3.127 3.064 3.002 2.941 2.881 2.823 2.765 2.709 2.654 2.6 2.547 2.495 2.444 2.395 2.346 2.298 2.251 2.205 2.16 2.116 2.072 2.03 1.988 1.948 1.908 1.868 1.83 1.793 1.756 1.72 1.684 1.65 1.616 1.583 1.55 1.518 1.487

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.949" PeakHeight="110.0" Num="3" Error="0.0">
-30.152 12.639 -2.933
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.949" EndFrequency="12.8" PeakHeight="365.628" Num="5" zHalfNm="269.725" Error="3.054">
-222.267 -27.273 -1.992 8.362 -2.123
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.335" Depth="0.122"/>
<TopsideChapman PeakHeight="365.628" PeakDensity="2032754.4" PeakScaleHeight="74.804" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
