<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 19:50:00.000"
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="12.0">
<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: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.21 (294) 19:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410211950009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.542" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.687" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.037" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.099" 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="/" />
<URSI ID="92" Val="374.245" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.241" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.473" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.900" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.991" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.390" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="158.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 316.111 317.222 318.333 319.444 320.556 321.667 322.778 323.889 325.000 326.250 327.500 328.750 330.000 331.250 332.500 333.750 335.000 335.000 336.429 337.857 339.286 340.714 342.143 343.571 345.000 345.000 345.000 345.000 347.689 350.377 353.066 355.754 358.443 361.132 363.820 366.509 369.198 371.886 374.575 377.263 379.952 382.641 385.329 388.018 390.706 393.395 396.084 398.772 401.461 404.150 406.838 409.527 412.215 414.904 417.593 420.281 422.970 425.658 428.347 431.036 433.724 436.413 439.102 441.790 444.479 447.167 449.856 452.545 455.233 457.922 460.610 463.299 465.988 468.676 471.365 474.054 476.742 479.431 482.119 484.808 487.497 490.185 492.874 497.037 501.584 506.570 510.000 520.000 525.000 535.000 540.000 550.000 560.000 575.000 590.000 610.000 629.106
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 0 0 0 0 0 0 72 0 0 0 0 0 0 0 0 69 0 0 0 0 0 0 57 75 75 0 0 72 0 0 0 72 69 72 0 0 0 0 0 0 0 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 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 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.953125 -1.171875 -0.390625 2.734375 -0.390625 -0.390625 2.734375 2.734375 -1.171875 -0.390625 -1.171875 0.390625 2.734375 -0.390625 2.734375 1.953125 -0.390625 1.953125 1.953125 -1.171875 2.734375 0.390625 -2.734375 -0.390625 -1.171875 1.171875 2.734375 1.171875 1.171875 -0.390625 -1.171875 2.734375 -1.171875 -0.390625 -1.171875 2.734375 0.390625 -2.734375 2.734375 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 1.953125 -1.953125 -1.171875 0.390625 0.390625 -2.734375 1.171875 -1.171875 2.734375
</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" >
89.733 90.0 95.0 100.0 105.0 110.0 115.0 117.669 120.0 125.0 125.337 130.0 133.006 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.245 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.407 1.818 2.031 2.099 2.044 1.969 1.969 1.969 1.969 2.048 2.099 2.169 2.334 2.493 2.651 2.811 2.974 3.141 3.313 3.49 3.673 3.86 4.053 4.249 4.449 4.652 4.857 5.064 5.272 5.481 5.69 5.898 6.106 6.313 6.52 6.725 6.93 7.133 7.335 7.535 7.734 7.932 8.128 8.322 8.514 8.704 8.892 9.076 9.256 9.431 9.6 9.762 9.915 10.057 10.185 10.295 10.385 10.45 10.489 10.5 10.5 10.494 10.479 10.456 10.425 10.386 10.34 10.287 10.228 10.163 10.092 10.016 9.935 9.849 9.759 9.665 9.568 9.468 9.364 9.258 9.149 9.038 8.926 8.811 8.696 8.579 8.461 8.342 8.222 8.102 7.982 7.861 7.741 7.621 7.5 7.381 7.261 7.142 7.024 6.907 6.79 6.674 6.56 6.446 6.333 6.221 6.111 6.002 5.894 5.787 5.681 5.577 5.474 5.373 5.273 5.174 5.077 4.981 4.887 4.794 4.702 4.612 4.523 4.436 4.35 4.265 4.182 4.101 4.02 3.941 3.864 3.788 3.713 3.639 3.567 3.496 3.426 3.358 3.291 3.225 3.16 3.097 3.034 2.973 2.913 2.854 2.797 2.74 2.685 2.63 2.577 2.524 2.473 2.423 2.373 2.325 2.277 2.231 2.185 2.14 2.097 2.054 2.012 1.97 1.93 1.89 1.851 1.813 1.776 1.74 1.704 1.669 1.634 1.601 1.568 1.535 1.504 1.473 1.442 1.412 1.383 1.355 1.327 1.299 1.272 1.246

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.099" PeakHeight="110.0" Num="3" Error="0.0">
-29.214 11.314 -2.367
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.099" EndFrequency="10.5" PeakHeight="374.245" Num="5" zHalfNm="272.241" Error="3.234">
-223.676 -29.813 16.262 -6.068 2.056
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.006" Depth="0.13"/>
<TopsideChapman PeakHeight="374.245" PeakDensity="1367866.0" PeakScaleHeight="74.39" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
