<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 18:10:00.000"
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: 45% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.30 (303) 18:10:00</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">
FF202630310301810009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.578" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.038" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="491.926" 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="2.888" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="364.414" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.463" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.194" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.826" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.295" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.264" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.210" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 280.000 290.000 290.000 295.000 300.000 305.000 310.000 311.647 313.294 314.941 316.588 318.235 319.882 321.529 323.176 324.824 326.471 328.118 329.765 331.412 333.059 334.706 336.353 338.000 339.647 341.294 342.941 344.588 346.235 347.882 349.529 351.176 352.824 354.471 356.118 357.765 359.412 361.059 362.706 364.353 366.000 367.647 369.294 370.941 372.588 374.235 375.882 377.529 379.176 380.824 382.471 384.118 385.765 387.412 389.059 390.706 392.353 394.000 395.647 397.294 398.941 400.588 402.235 403.882 405.529 407.176 408.824 410.471 412.118 413.765 415.412 417.059 418.706 420.353 422.000 423.647 425.294 426.941 428.588 430.235 431.882 433.529 435.176 436.824 438.471 440.118 441.765 443.412 445.059 446.706 448.353 450.000 455.000 460.000 460.000 463.333 466.667 470.000 470.000 475.000 480.000 480.000 485.000 488.292 491.926 495.959 500.459 505.513 511.231 517.750 525.254 533.984 544.265 556.554 571.500 590.071
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 66 66 57 63 0 0 57 48 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 0 0 0 0 66 0 45 57 60 57 54 60 57 57 57 54 60 57 54 57 57 54 48 48 51 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 -2.734375 -2.734375 1.171875 0.390625 0.390625 -2.734375 -1.171875 -1.953125 -1.953125 2.734375 -2.734375 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.953125 2.734375 1.953125 -0.390625 -0.390625 1.171875 -2.734375 0.390625 1.953125 -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 -1.953125 1.953125 -0.390625 -0.390625 1.953125 -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
</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" >
89.565 90.0 95.0 100.0 105.0 110.0 113.724 115.0 117.448 120.0 121.172 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.414 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.941 2.5 2.794 2.888 2.766 2.766 2.766 2.85 2.888 2.989 3.113 3.232 3.349 3.464 3.579 3.694 3.81 3.928 4.047 4.168 4.291 4.417 4.546 4.677 4.811 4.949 5.09 5.234 5.382 5.533 5.688 5.847 6.009 6.174 6.343 6.516 6.691 6.87 7.051 7.236 7.422 7.612 7.803 7.995 8.189 8.383 8.578 8.771 8.962 9.15 9.332 9.506 9.667 9.812 9.934 10.027 10.084 10.1 10.1 10.094 10.077 10.051 10.016 9.972 9.921 9.862 9.795 9.723 9.644 9.559 9.469 9.375 9.276 9.173 9.066 8.956 8.844 8.728 8.611 8.491 8.37 8.247 8.123 7.999 7.873 7.747 7.621 7.495 7.369 7.243 7.117 6.992 6.867 6.743 6.62 6.498 6.377 6.257 6.139 6.021 5.905 5.79 5.677 5.565 5.454 5.345 5.238 5.132 5.028 4.925 4.824 4.725 4.627 4.531 4.436 4.343 4.252 4.162 4.074 3.987 3.903 3.819 3.737 3.657 3.578 3.501 3.426 3.351 3.279 3.207 3.137 3.069 3.002 2.936 2.872 2.809 2.747 2.687 2.627 2.569 2.513 2.457 2.403 2.349 2.297 2.246 2.196 2.147 2.1 2.053 2.007 1.962 1.919 1.876 1.834 1.793 1.753 1.713 1.675 1.638 1.601 1.565 1.53 1.495 1.462 1.429 1.397 1.366 1.335 1.305 1.275 1.247 1.219 1.191 1.164 1.138 1.113 1.088 1.063 1.039 1.016 0.993 0.97 0.948 0.927 0.906

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.888" PeakHeight="110.0" Num="3" Error="0.0">
-30.099 12.562 -2.898
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.888" EndFrequency="10.1" PeakHeight="364.414" Num="5" zHalfNm="272.463" Error="3.071">
-194.203 -59.893 10.367 -0.735 1.222
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.172" Depth="0.122"/>
<TopsideChapman PeakHeight="364.414" PeakDensity="1265632.8" PeakScaleHeight="68.264" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
