<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 21:00:00.000"
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="15.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.10.16 (289) 21:00:00</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">
FF202628910162100009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.548" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.817" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="11.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.817" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="412.681" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="328.276" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.163" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.444" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.372" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.817" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="122.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.970" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="139">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 320.000 318.333 316.667 315.000 316.000 317.000 318.000 319.000 320.000 321.000 322.000 323.000 324.000 325.000 326.000 327.000 328.000 329.000 330.000 331.000 332.000 333.000 334.000 335.000 337.000 339.000 341.000 343.000 345.000 345.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 352.500 355.000 355.000 355.000 356.667 358.333 360.000 360.000 361.882 363.765 365.647 367.529 369.412 371.294 373.176 375.059 376.941 378.824 380.706 382.588 384.471 386.353 388.235 390.118 392.000 393.882 395.765 397.647 399.529 401.412 403.294 405.176 407.059 408.941 410.824 412.706 414.588 416.471 418.353 420.235 422.118 424.000 425.882 427.765 429.647 431.529 433.412 435.294 437.176 439.059 440.941 442.824 444.706 446.588 448.471 450.353 452.235 454.118 456.000 457.882 459.765 461.647 463.529 465.412 467.294 469.176 471.059 472.941 474.824 476.706 478.588 480.471 482.353 484.235 486.118 488.000 489.882 491.765 493.647 495.529 497.412 499.294 501.176 503.059 504.941 506.824 508.706 510.588 512.471 514.353 516.235 518.118 520.000 525.000 535.000 547.462 563.995 586.982 621.119 677.116
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 75 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 78 0 0 0 0 75 0 78 0 78 75 0 81 78 0 0 78 0 69 0 0 78 78 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 51 0 66 66 66 66 63 60 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -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 1.171875 -1.171875 -1.171875 -1.171875 -0.390625 2.734375 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.171875 1.953125 -0.390625 -1.171875 -0.390625 2.734375 -1.171875 -1.171875 -2.734375 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 -1.171875 -2.734375 0.390625 1.953125 -1.953125 -0.390625 1.171875 2.734375 -1.171875 -1.953125 -1.171875 1.953125 -0.390625 -0.390625 2.734375 -2.734375 0.390625 0.390625 -2.734375 -2.734375 -2.734375 2.734375 -2.734375 2.734375 1.953125 -2.734375 1.953125 2.734375 -2.734375 -0.390625 2.734375 -0.390625 1.171875 1.953125 1.171875 2.734375 -0.390625 2.734375 1.953125 1.171875 -1.171875 1.171875 -1.171875 -2.734375 2.734375 1.953125 1.953125 2.734375 1.171875 -1.953125 2.734375 2.734375 -1.171875 0.390625 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -1.953125
</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" >
90.517 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.547 135.0 140.0 145.0 150.0 155.0 155.094 160.0 165.0 170.0 175.0 177.641 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 412.681 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.543 0.708 0.791 0.817 0.804 0.764 0.692 0.578 0.493 0.493 0.493 0.493 0.493 0.493 0.493 0.563 0.635 0.707 0.779 0.817 0.872 0.984 1.099 1.219 1.347 1.485 1.635 1.798 1.975 2.168 2.377 2.602 2.843 3.099 3.368 3.649 3.941 4.241 4.548 4.86 5.177 5.496 5.818 6.141 6.465 6.788 7.111 7.432 7.751 8.068 8.38 8.689 8.991 9.287 9.575 9.853 10.12 10.374 10.613 10.834 11.036 11.215 11.369 11.496 11.594 11.661 11.695 11.7 11.698 11.685 11.658 11.618 11.567 11.504 11.431 11.348 11.256 11.156 11.048 10.933 10.811 10.684 10.552 10.415 10.274 10.13 9.982 9.831 9.679 9.524 9.368 9.211 9.052 8.894 8.735 8.576 8.417 8.259 8.101 7.944 7.788 7.634 7.481 7.329 7.179 7.03 6.883 6.738 6.595 6.454 6.315 6.178 6.043 5.91 5.779 5.651 5.525 5.401 5.279 5.16 5.042 4.927 4.814 4.704 4.595 4.489 4.385 4.283 4.183 4.085 3.989 3.895 3.803 3.714 3.626 3.54 3.456 3.374 3.293 3.215 3.138 3.063 2.989 2.918 2.848 2.779 2.712 2.647 2.583 2.521 2.46 2.4 2.342 2.286 2.23 2.176 2.123 2.072 2.022 1.972 1.924 1.878 1.832 1.787 1.744 1.701 1.66 1.619 1.58 1.541 1.504 1.467 1.431 1.396 1.362 1.329 1.296 1.264 1.234 1.203 1.174 1.145 1.117 1.09 1.063 1.037

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.817" PeakHeight="110.0" Num="3" Error="0.0">
-25.521 6.989 -0.951
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.817" EndFrequency="11.7" PeakHeight="412.681" Num="5" zHalfNm="328.276" Error="3.627">
-233.583 -5.039 5.801 -4.283 2.064
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="67.641" Depth="0.324"/>
<TopsideChapman PeakHeight="412.681" PeakDensity="1698387.1" PeakScaleHeight="62.817" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
