<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-19 -292 20:10:00.000"
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="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" >
2026.10.19 (292) 20:10:00</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">
FF202629210192010009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.358" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.882" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="541.394" 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="1.819" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="434.712" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="293.812" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.447" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="198.303" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="61.004" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="104.941" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="195.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.210" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.550" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.3 10.35 10.4 10.45 10.5 10.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 290.000 290.000 295.000 295.833 296.667 297.500 298.333 299.167 300.000 300.000 301.875 303.750 305.625 307.500 309.375 311.250 313.125 315.000 316.875 318.750 320.625 322.500 324.375 326.250 328.125 330.000 331.875 333.750 335.625 337.500 339.375 341.250 343.125 345.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 355.000 360.000 362.500 365.000 370.000 370.000 373.061 376.121 379.182 382.242 385.303 388.364 391.424 394.485 397.546 400.606 403.667 406.727 409.788 412.849 415.909 418.970 422.030 425.091 428.152 431.212 434.273 437.334 440.394 443.455 446.515 449.576 452.637 455.697 458.758 461.818 464.879 467.940 471.000 474.061 477.121 480.182 483.243 486.303 489.364 492.425 495.485 498.546 501.606 504.667 507.728 510.788 513.849 516.909 519.970 523.031 526.091 529.152 532.213 535.273 538.334 541.394 544.455 550.000 555.000 565.000 570.000 580.000 590.000 600.000 615.000 630.000 645.000 665.000 690.000 715.000 750.000 795.000 850.642
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 66 66 69 0 69 0 0 0 72 66 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 63 0 69 66 57 54 0 69 72 0 72 60 60 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
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -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 1.171875 2.734375 2.734375 1.171875 2.734375 2.734375 1.171875 -0.390625 -1.171875 -2.734375 1.953125 1.171875 1.953125 1.171875 -1.171875 1.953125 -1.171875 -0.390625 -0.390625 1.171875 -1.171875 1.171875 1.171875 0.390625 -2.734375 0.390625 1.953125 -1.171875 0.390625 0.390625 -1.953125 2.734375 -1.171875 0.390625 -0.390625 -2.734375 1.171875 -0.390625 2.734375 1.953125 -1.953125 -1.171875 -2.734375 1.953125 1.953125 -2.734375 -1.171875 2.734375 -1.953125 0.390625 -2.734375 2.734375 2.734375 2.734375 1.171875 -1.171875 -1.953125 2.734375 0.390625 2.734375 -0.390625 -2.734375 -1.171875 -1.953125 -2.734375 -1.171875 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="35">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
90.000 92.000 94.000 96.000 98.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 98.333 96.667 95.000 95.000 100.000 105.000 110.000 110.000 110.000 107.500 105.000 110.000 107.500 105.000 100.000 95.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 69 69 0 69 0 69 0 0 0 0 0 0 0 0 0 0 0 0 0 60 57 60 0 0 57 0 54 51 54 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 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
</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" >
89.815 90.0 95.0 100.0 105.0 110.0 115.0 119.237 120.0 125.0 128.475 130.0 135.0 137.712 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 434.712 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.218 1.575 1.76 1.819 1.78 1.683 1.683 1.683 1.683 1.705 1.779 1.819 1.867 1.974 2.085 2.2 2.32 2.447 2.58 2.721 2.87 3.028 3.194 3.369 3.552 3.744 3.943 4.148 4.359 4.573 4.791 5.01 5.229 5.448 5.666 5.883 6.097 6.308 6.516 6.721 6.923 7.12 7.315 7.505 7.691 7.873 8.051 8.225 8.394 8.558 8.718 8.872 9.022 9.166 9.304 9.437 9.563 9.684 9.797 9.904 10.004 10.096 10.18 10.257 10.325 10.384 10.435 10.476 10.509 10.532 10.546 10.55 10.55 10.547 10.54 10.529 10.513 10.493 10.469 10.442 10.411 10.376 10.338 10.296 10.252 10.204 10.154 10.101 10.045 9.987 9.927 9.864 9.799 9.733 9.665 9.594 9.523 9.449 9.375 9.299 9.222 9.143 9.064 8.984 8.903 8.821 8.738 8.655 8.571 8.487 8.402 8.317 8.232 8.146 8.061 7.975 7.889 7.803 7.718 7.632 7.546 7.461 7.376 7.291 7.206 7.122 7.038 6.954 6.871 6.788 6.706 6.624 6.542 6.462 6.381 6.301 6.222 6.144 6.066 5.988 5.912 5.835 5.76 5.685 5.611 5.538 5.465 5.393 5.322 5.251 5.181 5.112 5.043 4.975 4.908 4.842 4.776 4.711 4.647 4.584 4.521 4.459 4.397 4.337 4.277 4.218 4.159 4.101 4.044 3.988 3.932 3.877 3.823 3.769 3.716 3.664 3.612 3.561 3.51 3.461 3.412 3.363 3.315 3.268 3.222 3.176

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.819" PeakHeight="110.0" Num="3" Error="0.0">
-28.768 10.718 -2.135
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.819" EndFrequency="10.55" PeakHeight="434.712" Num="5" zHalfNm="293.812" Error="3.563">
-305.367 11.618 -0.828 -4.041 1.618
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.712" Depth="0.136"/>
<TopsideChapman PeakHeight="434.712" PeakDensity="1380924.4" PeakScaleHeight="104.941" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
